I went to my 25th. I hate to say it, but I did it for my own purposes. I was the scrawny geek that nobody noticed and was a very late bloomer. I got me a form fitting dress and let them see the bloom, LOL No need to go back. It wasn't even that fun. The people I want to catch up with, I'm already in touch with and the rest, well, if they didn't like me back then, I can assure you they'll like me even less now. So why bother?