Numbers and figures, brother. More more more more more. Besides, negative emotions hold me back.
Okay, if we look at psychology, drive comes best from intrinisic motivation, which comes from pleasure, which renders this thread nary a discussion at all. So we're all taking a bit of liberty from that definition. I think it would be kinda cool if I could really develop the Vulcan side of Spock though. Just that cold rationalism would come into use often.