Live Long and Prosper: Building Characters

So I saw the new Star Trek movie last night. I can't remember the last time I saw a movie within a week of its release. Welcome to life with kids, I guess.
Despite all the special effects, glitz, and weird pseudo-scientific fantasy, the characters made that movie enjoyable. Especially Spock.
Spock has what every fictional character needs: a whopper of an internal conflict. He's a walking conflict, a "half-breed", constantly at war with his emotions and expectations others have for him and his beha