AC/DC
I grew up an Air Force Brat - so I went to two different High Schools. DID NOT like the one I graduated from. This was pretty much reinforced my freshman year of college when I went back for Homecoming, and got the glance, and "oh hi", nothing more.

Haven't been to a university reunion either per sae. About 5 years after I graduated I was invited to a "departmental" reunion camp out - multiple years of students and professors (I was a Wildlife Ecology major). And that was an absolute blast! Was fun meeting some of the students that were the legends, pranks, by the time I was there. And hearing retelling of some of the stunts I was a part of.. Moi? Innocent Moi? was amusing too. Nothing quite like passing around a collection jar to buy a professor a new pair of jeans because he blew the crotch out of his playing volleyball at the event, and didn't know it. We were all happy he had on tighty whities.

The difference between the two: High school, I felt like I didn't fit in, thus absolute no desire to see those people again. College - I did, and was a student in a small fairly close knit department of a major university. Of course it's been mumble mumble mumble 27 years since I've graduated, and I haven't attended anything since that camping trip.