I've always kind of liked fitting in. While there's something to be said for nonconformity, you can't help but want to be like everyone else once in a while... or most of the while. No one should be a martyr to the cause of himself.
Likewise, I've always believed that if you're going to try and fit the universe's norms, you shouldn't settle for being mediocre or substandard. You should be the best damn person you can be, whether that means you're the most compassionate, the fastest typist, or simply the strongest. If you're going to fit in, you should do it with a bang. Play the game, but make up your own rules.
The key to fitting in is showing people what they expect to see. Then they're much more willing not to notice how you're different. If they expect to see a jock, show them a jock. Read your Shakespearean sonnets in the privacy of your home. If they want to see a nerd, show them a nerd. Play stud with the girls from the next town over.
If everything goes well, the only person who'll notice you're different is you. And you can pretend not to see.