Tossup between Turian and Quarian. I find both fascinating and would depend on how it played out. If it's just a straight Destiny 'clone', Turian. If it were a bit more evolved than just a shooter, say with more engineer-y elements, probably Quarian. Of course, if it's an MMO, the option for multiple characters is kind of a given, so... I'd just end up with one of each anyway.
Legion himself identifies (as much as a geth mobile unit can identify itself) as many, this he picks the name Legion, "for we are many", when woken up on the SR-2.
Don't get me wrong, Geth are probably the most interesting race in the galaxy, but I just can't see people picking it as a main. How would that work in a sense of a game is what I have issues with.
I'd meant if other units, at launch identical to the one we refer to as Legion, existed and were tasked with surveying organic interactions. They would constitute the drones we would play in this game.
If that were the case, I think Legion's uniqueness and exhibition of a "soul" (starting as early as using Shepard's armor for repairs) could be diminished.
