-Seemless and manual, water to land to air to space and vise versa transition in 2nd and or 3rd person point of view.
-The ability to organize and control bases, operations and missions to squad members or misc npc's that the main character can send out similar to assassins creed blackflag, but instead of just sending them out and being done, The main player can actual choose to join in on these side tasks and assist either the squadmate or a significant npc before or during a live assignment.
-EXAMPLES: Sending a squadmate out either alone or as squad captain of misc Npcs or other team squadmates to complete specific objectives, securing a base, eliminating a target, Deliverying something important, etc. Being an explorer and battle hardened veteran and having nothing of significance to do at the moment, you have the option of actually joining either said team (instead of waiting for some dumb timer) before or during they're assignment either as a part of the squad as a foot soldier vanguard, supervising from orbit or nearby viewing the entire fight from they're 1st person camera perspectives or actively engaging enemy from a distance.
-Bringing a variety of body,armor and weapons like in mass effect 1 but better. I felt suffocated when I couldnt customize my weapons and armor the way I wanted to in mass effect 2. Mass effect 3 did a little better but it still felt like somethings were missing like alot more piece by piece armor, weapon and body modifications.
-Being able to view inside of the mako and interact with squadmates and or the tech inside.
-Being able to establish personal bases through out the galaxy wherever just because we fucking can.
-Communication,Communication,Communication!. It would be very nice to be able to have some form of communication, Specifically after the main story is done to complete things that I didnt during the main story. I hate playing a really amazing RPG game with characters that seem to "die" after the main story.
Just to name a few, when I think of more thing which have but cant think straight right now, I will post it.
Forward:// Admiral Steven Hackett, Fifth Fleet From://// Commander Misako Shepard SSV 2 Normandy

The reapers are here. Its been nearly 3 years since the first evidence of the reapers invasion of the galaxy. Since the beginning, my crew and I have been trying to warn the council of the impending crisis, yet they, time and time again turned a blind eye (specifially the turian ass whole). It all began with a beacon on Eden Prime, where we first incountered saren and the geth and also our first glimspe at the reaper known as Soverign. I lost two people down there, one a Spectre named Nihlus Kryik, and Corporal Richard L.Jenkins. Nihlus was personally killed by a rogue spectre named Saren. Corporal Jenkins was kill by enemy geth drones that ambushed us a few minutes after we were left at the drop off point. I also gained an important ally, Gunnery Chief, Ashley Williams. From that mission on, i made it top priorty to stop saren and his geth and to find the secret to his infuences also to see why the geth were following him. At every turn though, he would always make a hasty retreat. To stop him, i had to assemble a team. On the citadel I recruited a krogan named Urdnot Wrex , a Turian C-Sec Investigator name Garrus Vakarian, and a Quarian formally named Tali'Zorah nar Rayya, Presently Tali'Zorah Vas Normandy to help me stop the threath of galactic terrorisim. My team and I also rescued an asari name Liara T'soni in the Artemis Tau Cluster on Therum from geth that tried to take her, but to where and for what reason, i have yet to know. Since then, we've been scouring the galaxy looking for clues to finally shut saren down. When at last we found saren on a planet call Illos, he escaped yet again. Leading us on the planet through thick geth troops and mechs, we finally found the conduit, which would send us back to the citadel. Upon arrival to the citadel, it was brought to our great dismay that soverign was making a bee line straight for it. We hacked our way through to were saren was , though we incountered a well equipted force of geth and krogan troops on our way. After much delay we finally caught up to him on in the Citadel Towers, and after a short vocal reasoning with him, he ended his life. Meanwhile, the entire citadel Armada was engaging soverign as he was trying to take control of the citadel. As i sent my two teammates, Garrus and Wrex, down to make sure saren was dead, Soverign must have taking full control of him and completely husked him into a mindless puppet, which we kill swiftly. Just then, the Normandy gave the final Strike on Soverign.A few months after the battle of the citadel, the council had my crew and I fucking around in space for meaningless reasons when we could have been trying to stop the reaper invasion. Then it happened, out of nowhere a collector ship attacked and destroyed my ship The SSV Normandy. Twenty crew members died that day,The Fallen, sergents Jamin Bakari, Germeen Barrett, Addison Chase, Silas Crosby, sisters Rosamund Draven and Talitha Draven, Alexei Dubyansky, Hector Emerson, Robert Felawa, Harvey J. Gladstone, Caroline Grenado, Marcus Grieco, Orden Laflamme, Helen M. Lowe, Monica Negulesco, Abishek Patik, Mandira Rahman, Raymond Tanaka, Carlton Tucks, and Amina Waaberi. Also, my second in command and dearest friend Navigator Pressly. I also died that died saving my Flight Lieutenant Jeff "Joker" Moreau. Two years pass and i wake up inside of a Cerberus Facility call " The Lazarus Research Station" which is where I met my 2 new squad members, Miranda Lawson and Jacob Taylor, and also is where i had my first incounter with "The Illusive Man", a very shadowy person with oministy all around him. (The illusive man gave me the location of the exact same collector ship that attacked me two years ago, and while on that vessal, we discovered that the collectors were actually proteans repurposed my the reapers for their own satisfaction and desires). After all of that, i get dossiers to form a team to stop the collectors from kidnapping human colonies.Thane Krios, Katsumi Goto, Zaeed Massani, Urdnot Grunt, Jack, Tali, Mordin Solus, Samara, Garrus, and a geth named Legion, all of whom fought with me to get to the collector home world ( base ) . As expected, there was heavy resistence, but no casulties out side. When we finally reached the inner most section of the base, we fought off several waves of collectors as we discovered and simutaniously sought to destroy an enormous reaper that had the form of a human. We soon destroyed it and soon after, purged the base of any and all life left aboard, but kept the base intact at the Illusive man's request. After that misson things got quiet and i had went to do a mission in search of Dr Amanda Kenson at Admiral Hacketts request. I found her and he betrayed me after i saved her. She and everyone else were being indoctrinated by a reaper artifact that they had stumbled upon and brought on board previous to my arrival. On the ship i had to make a decision to warn the baterians or not. I chose to warn them, yet they did now heed me, so an entire batarian system was wiped out that day by my hands. Dr Amanda Kenson killed herself with a bomb as i tried to reason with her. I escaped to the outside of the station and ran into resistance that was blocking my way to the com link on the otherside, which i swiftly dealth with. As i readied myself, calling out to the normandy, after i connected to the com link, the reaper Harbinger reared his presence and spoke to me,telling me the end is inevitable. Soon after he disappeared and the normandy arrives just in time to pick me up and FTL out before the blast. Now im headed for earth to stand trial for the batarian deaths, which im willing to bare burden. The reapers ARE coming and we've got to stop them. I've got to assemble the entire galactic armada and nothing less if we are to win. I just hope they dont rip me of my rank status and ground me. There's bigger things happening out there. The reapers are just over the horizon.I Just Hope Were Ready For Them When They Come.