I’ll echo delphica to some degree. My 30th is this year and I’ll go. I went to my fifth, my tenth and both of my 20ths.
I enjoyed them all. The “both” above refers to the fact that I spent 7th-11th grade on a scholarship at a prep school, where I eventually became perpetually on the outs. These were hippie lynchin’ times and I just could not master the appropriate haircut, which finally got me expelled. And I managed to be the first person ever caught smoking on campus (by my next-door neighbor and biology teacher and assistant soccer coach). The offense had never occurred before, so there was no known sanction. I didn’t even get a detention hall, but everyone who followed got expelled.
While I’d started out well in sports (very much a requirement), when the hippie thing enveloped us all, I was more open about not actually enjoying football, and quitting the team was not a popular move. I became one of the bad boys who wrote of the benefits of legalizing marijuana in the underground rag.
And had manny detractors (by the end the coach regularly used me as an example of pond-scum). So I went on over to the local public high (right next door as a matter of fact) for my senior year.
I have found that all the h.s. b.s. has evaporated in its entirety. People with whom I had dismal relations were quite companionable. This phenomenon is possibly partly due to it having been a small school (graduating class ~45 people) in a big little city.
My chief antagonist (captain of the football team and SG pres, whom I ran against) hosted a dinner party at his house for one of the events, and displayed his mighty wealth (so what?). And I enjoyed some truly stimulating conversation with him (sports attorney).
So, I’m not saying that you won’t encounter any of the old b.s., but my experience has been great so far, and I would encourage anyone to go, try it. WTF, you can always leave if they won’t talk to you (but I doubt that’ll happen).
I’ll confess my one attendance at the 20th for my H.S. that I attended for only one year wasn’t GREAT! But it was an OK schmooze - much bigger school, ~3200 students in grades 10-12, but once again, everyone had blown off the b.s., or so it seemed to me.