Had to go with Obi-Wan - after all, he had the coolest line of the whole trilogy (that I can think of right now) :
Annie - Now I am the master!
Obi - Only a master of evil, Darth!
Or something.
Oh, and I never saw what was so great about Boba Fett and why he's so popular. Basically he looks cool, but he doesn't do anything except fall in that pit thing in Jedi. Jango Fett will be much cooler in Attack of the Clones because he's played by Jake the Muss. Can't wait for him to say to his wife, "Cook the man some eggs, love!".