No love for the Salarians? Really?
I'd like to be part of a Salarian STG, so an Infiltrator. Male, I guess. Those guys do what needs to be done, so probably more on the Renegade side. Salarians are awesome, one of the most intelligent races in the galaxy, perfectly suited for science or espionage. Silent, ever alert!
The only drawback is their short lifespan, but they live fast, they probably see, do and think more than most other people in the galaxy.