I might have gone to my 10 if I was even living in the same country and it was convenient. Reality was that I couldn't be bothered to fly to the US.
It's strange, via facebook I see that so many of my old classmates have moved back to Atlanta and live in similar areas to where we grew up. Don't get me wrong, we lived in a very nice affluent part of the city, but for as much as everyone complained about how dull it was, it seems like they just went off to school then immediately moved back to Atlanta and became their parents.
One of my old friends who did go to our reunion told me that while he had fun it was best to stay away as they would suck you in to a strange vortex of domestic suburbia. And that was at the age of 28