Well now that I've learned to control the Raptor, its pretty cool, and its very cool to shoot down an enemy Raptor and hear "Top Gun!" in that UT-Anouncer guy voice.
The Manta is pretty cool, very speedy, although I havn't gotten the hang of buzzing people down yet.
The tank is one of my favotires, along with the Raptor, as its pretty damn powerful.
The Hell-somethingerother, the Humvee with the lazers and such on it, is pretty cool, atlhough I don't use it often because the driver doesn't have a weapon and its kinda hard to get someone to hop in sometimes.
Neat little thing with the Hell-somethingerother, when you hop into the drivers seat, the license plate changes to your name. At least, it did for me.