Know what I hate most about the voices? It's a subtle thing about the actual writing, not the voice acting.
What I hate most is how so many ships have a response appropriate to a single soldier, like you'd find in Warcraft, not a ship with thousands of people aboard.
They're always referring to themselves as "I", or "me". I know you're talking to an individual captain, but that's a flimsy excuse, because it's obvious that the lines weren't written with that in mind.
Not to sound too harsh, but it's simply a failure of mindset on the part of the writer. They were thinking of what this single unit would say if you click on it, not what the captain of a multi-thousand-crewed vessel would say if contacted on a radio.
TEC Frigate: "Gotta job for me?"
Me: "Yeah... pizza delivery boy. I think it's right up your alley."
Surprisingly, this actually bugs me more than hearing the voice actor who did Teenage Mutant Ninja Turtles and Starscream from the Transformers play the part of a "scary" alien, and believe me, that's a hard, hard act to beat. 
Overall, the voices just have WAY TOO MUCH character.
