You have issues.
I voted for Carth.
1. He looks cool.
2. He sounds cool.
3. He's good in a fight, if you know how to use him.
4. He gets a cool story.
5. Once you get past his issues he's a really cool and supportive guy.
Of course that's not to say I didn't fancy the pants off Bastila. Winding her up was a lot of fun too.