Good for you. You know, I never smiled until I got braces. I hated my smile. Most kids hate the idea of braces, and hate the idea of smiling with them because it shows that they have them. For some reason, ironically, braces brought the smile out in me more often. They require maintenance and upkeep, but nothing too bad.
The movement periods, the first week after installation of a new set of stretching bands/chains, is the most painful, but it's a dull pain, not a sharp one. You will be irritated and crabby, at worst, but it's nothing to cry about.
I cannot stress enough that you wear your retainer when treatment is over. Trust me on this. I didn't have time to maintain my retainer and my bottom retainer [cemented] broke while I was in basic training. My teeth drifted just enough that I couldn't use my retainer again, and now my teeth are almost back to where they were before I was treated. It's money down the drain, and a real slap in the face.