You can take a quiz at the link below to tell you which Enterprise character you are most like. Only problem with it is that it's rather obvious on some of the questions which answers give you a point towards which character.
http://www.red-anubis.com/quizes/entquiz.html
I'm Archer, by the way. Probably because of my argumentative, combative, "I'm-always-right" attitude.
Now if only I could figure out a way to get those little images to appear in my signature...