Hmm. I like the Terrans.

Except Command and your wimpy wingmen. I understand putting some death sounds as carrying fear, but having all humans screaming for help as they die, and all Vasudans saying noble crap like "Avenge me!" (not that it's crap, but it's crap that the Vasudans are the only ones that do it)... I'd expect a good mix in there. Shivans are kinda neat, but I don't like their single-mindedness. They act like biological/mechanical robots... very intelligent ones, to be sure, perhaps hive mind explains this.
Vasudans are bitter over the Great War, and think too highly of themselves, and their ships (in FS1) suck IMHO. (Think TIE fighters.) I like the Terran weapons and craft. And since I fly in them, and defend them, I like them. Now if I could fly Shivan craft with Terran personnel that had Vasudan bravado and Terran open-mindedness (questioning Command when they are being stupid)...