Oh come on you people all know it goes

1: Mordin - Because he made me cry with his damn singing in 3 and I'm not ashamed to say that.
2: Wrex - Everybody loves Wrex he is Wrex 
3: Garrus- Garrus Brokarian has the best bromance in all of videogames 
4: Grunt - I just love Grunt because well he is like an overgrown kid with a shotgun
5: Legion- Because he has a soul and that is about it.

And we will all watch with baited breath...