Rick - I can agree strongly with just about everything that everyone has said so far - even the mutually exclusive things.
I went to a big school, 660 in our graduating class, but I could count my friends on one hand.
I've been to one reunion, and missed one. I'm glad I went, don't care if I never get to another one. Wasn't surprised by the people who were exactly the same. For the most part, wasn't surprised by the poeple who had changed (there were a couple shockers - people who's personalities had radically shifted). A few people keeping score, many more just renewing and making friendships. Every aged to some degree.

But the biggest thing for me was how enlightened I was about myself. NOBODY recognized me. Not one person. And my looks haven't changed that much (honest, people there told me so). Not the people I shared classes with for 10 years, not the girl who cheated off my Spanish papers for 3 years. Until they heard my name. Then the synapses would fire and they'd recall "the kid who turned his eyelids inside out" or "the quiet kid who played bass in the back of the room." Some of what I was remembered for and told gave me a lot of food for thought. And I believe that a person should pull out his soul every few years and look it over to see if he likes what he finds.

BTW - for the scorekeepers, you said "...I was a folksinger who wanted to see the world. 35 years later, I've seen a lot of it...and I'm still a folksinger..." it sounds like you had a dream, and lived it. That puts you one up on a LOT of people in the world.