I really liked the role played by a Garrus as Shephard's friend and that too from the beginning of Mass Effect 1. I also liked the role of Tali Vas Normandy, but In my game play I find it okay for Tali's death in the end of Mass Effect 1. one of my favorite and toughest character I lost in Mass Effect 2 was Grunt. To me he sounded like one of my friend from Toronto, Just like he had some talks about Victory so did Grunt had too...
As their were options in game Shepard could have made love with Miranda Lawson as well but it Miranda wasnt meant to really jump in to romance which just ended with one kiss in her room.
However Ashley Williams was the sexy look. but she didnt had much trust with Shepard since he worked for Cerberus (thought to be a terrorist organization with Illusive men who runs it with crazy Idea to control the reapers.)
I really loved the Guns in Mass Effect 3, Falcon Ended up the best however it had few rounds even with Falcon V upgrade I liked killing enemy just 3 to take down the toughest enemy. I even took down Lt. Kai Leng assasian down with the Falcon, I read on blogs and forum Kai Leng is difficult to kill but I just took in him down with few shots. That was damn easy, with the right gun in hand. I choose N7 armor that I downloaded later, after I was done with Kai Leng at Illusive Man's base. N7 body armor has some good health benefits to save from shots.
Then heading to the end of the game when Citadel is taken to Sol(our solar system) by the reapers, since reapers are attacking earth. Shepard had a mission to get down at London and continue with fight from their. I really hated Banshee too, they were difficult to kill because the change their position very quickly however with right guns and some grenade and team work strategy I found a way to take them down but too many of them while in London was just crazy, I took down 5 of them there. After I took down the reaper that was standing right infront of the laser system that takes humans to citadel up in Sol space with the Missiles perfected by EDI, the story and game play doesn't have much in the players control. It was really very surprising to find that the little kid he was seeing in dreams is the catalyst and Citadel is the Crucible. After that all he had to sacrifice his own life for the sake of momentary peace in galaxy, Reapers was presence was to continue the cycle which ended up with Shepherds sacrifice, Shepard died because he wasnt completely organic(which I never felt that he has some synthetic parts in his body) He makes his choice as per the game play options kills the Illusive man,and the reapers dies of the crucible.
I predict the Mass Effect 4 part can come since Shepard mention in the game he can control the reapers or something like that to the kid (catalyst). I have some screenshot I took click read more to view .