I went to my 20th, but only because it was convenient to be in town at the time. My graduating class was nearly a thousand, I wasn't a very social type in high school, left town (and the state, and for the most part, the country) a couple of years after graduating, and most of my friends in H.S. were a year or two ahead of or behind me, anyway. The few I actually wanted to see again didn't show up. Then again, a chance meeting that could not have happened anywhere else could have made it all worthwhile...

Go with your gut.