Huh... I was expecting a more thorough answer... //^_^\\'... Ahh well... Feel free to expand at any time...
For me, I don't think I have what it takes to be a superhero, but not for exactly the same reasons as you, Sun Tzu...
I am a pretty good and decent person myself... (I do volunteer work when I have the opportunity and I rather enjoy helping people). For the self-sacrificing part... well, it's a mixed bag. There have been several times where I've stood up for people that are getting made fun of (and yet, seem to be unable to do so for myself)... And there was one time (I'd rather not give full details) I actually stepped in when someone was advancing towards another person with a knife in hand ... (One of the scariest moments in my life... It was... rather impulsive. I didn't think about what I was doing. I remember I tried reasoning with the knife-wielder... if someone else *luck was on my side, apparently* hadn't stepped in and actually got a hold of him, I'm sure I wouldn't have come out of that situation without any injuries *or worse*)...
However, there's another time that ran more contradictory to that... I was out during Halloween with a friend... and there was one of those idiots walking around with a chainsaw to scare people. My friend assured me that as long as I didn't pay any attention to him, he wouldn't go after us to make us more scared... However, at some point, my mind decided "Screw this..." and I panicked... and I shouted to my friend "RUN!" and I took off (fastest I had ever run, she said she had never seen me run so fast) and left her behind. So, obviously, I'm not above abandoning people in order to save my own skin...
The problem with both of those situations is that I acted on impulse. I think, perhaps, if I actually had training (like the kind soldiers have in order to go into a situation with a cool head and not operate entirely on instinct)... I could better control that impulse. So, I don't think, really, being self-sacrificing would be a problem for me, in that case...
There are a few major things psychologically that could impede me as a superhero. For one, I'm a very sensitive person. I don't mean to be. I'm well-aware of the dark things that go on in this world. Yet, despite all of the things I've gone through and the things that happen in this world, a few harsh words will be all it takes to make me a nervous wreck. Not a good thing if you happen to witness a particularly violent crime before you can stop it... or if you're going up against a particularly nasty supervillain. Which, speaking of supervillains... I can be quite gullible, at times. It's rather odd because I'm generally considered to be quite intelligent... And yet, it's almost ridiculously easy to take advantage of me. I'd probably be fine against dim-witted villains, but for the manipulative-type... Probably not so much.
And then, I'm also a passive person. I'm far too willing to just let things happen to me. There are times I can be... pro-active... (like taking care of college stuff, getting myself a part-time job)... I mean, I'm quite capable of fending for myself. But... if someone starts screaming at me, I'm all too likely to just stand there and take it (and believe it to be my fault when, in hindsight, it turns out that it wasn't). Most superheroes aren't passive people. They're usually very assertive and pretty sure of themselves (at least, when they put on the mask and all).
At the moment, I'm not entirely sure I'd have enough flexibility in my life to do hero work... and I don't think I will ever, either. Also, I'm not physically suited for a job like that. One punch to the gut would probably be all it would take to floor me. As for the possible motivations I'd have to decide I need to go fight crime and whatnot... Hmm. I can't honestly think of any... I mean, I'm sure that I'd like to prevent it, but beyond that... Probably the only other reason because it sounds like it'd be totally awesome (Awesome is my favorite word!

). So, I wouldn't have a strong enough desire for it.
As for what superpowers I'd like to have? Mind control..... Or the ability to control insects...
