That's a tough debate. On one hand, I love green eyes and red hair, and of course, Star is gorgeous and funny and adorably innocent, but Raven is equally attractive, but much more relatable (to me anyway because I hate people :P ), wears my favorite color, and she's a fucking tentacle demon. Also, I love sarcasm, and even though GO! sucks, I can't deny that Lady Legasus is both funny, and totally sexy.
VERY close call, but I prefer Raven, myself.