For every Carmack, there's 1000s of unspoken/unheard of people doing the same thing. I try to think of them, myself, and not get too excited...
Steve Jobs was Steve jobs because he thought different. You're not going to turn into him or Carmack by trying to emulate them or by following tweets and prostrating yourself.
P.S - the only reason why I commented is because I have friends who constantly give me updates about what Carmack is doing as if they've just had an encounter with God. I can't help but think they are this way because they themselves have never coded at that level. Sadly, you don't get to that level by going Gaga over another programmer. You get to that level by understanding that there is nothing amazing about what Carmack/etc does, digging into something you care about, and pushing your own personal limits... People don't want to hear these kinds of things though as it necessarily compels them to action. They'd much rather rally around the superstar and put him/her on a chariot. Vicarious living?
P.S.S - Constructive discussions can occur on a topic easily as long as individuals aren't over hyping it and are actually capable of conversing at a similar level. Fanfare is just as harmful as it makes people believe there is some mystical magic to achieving things. There isn't.. Just dedication and passion.