Survival instincts play a big part of it, to be honest. I'm not suicidal but I hate waiting; those long Sunday afternoon's would literally end in me killing myself to speed things up if I didn't have the urge to live so much.
For me, I just want to enjoy life, whether its on my own or with someone else. I want to die a smiling old man, knowing I've done many enjoyable things before I passed away. Hell, I'd be happy to die doing something enjoyable.
Still, I have this weird urge to be someone's 'hero' at some point. Maybe I've played too many games, watched too many movies, or just plain obsessed over Power-Rangers more than I thought, but I want to feel like I've kept someone I know and love out of some kind of danger. I don't wish for them to be in any danger in the first place, but I'd like to feel (and I'd like them to feel) that I could 'save' them if it really came to it.
I'm way too much of a goody-goody...