Ha.. mine (5 year) was exactly the opposite. We had a small class, and I barely recognized anyone! I pretty much hadn't seen anyone since graduation, so that made it harder, but a lot of people (mostly the girls) had put on a lot of weight and weren't too recognizable anymore. Others had changed their hair a lot (cut a bunch off or grew it out, changed colours completely, etc)

Ours was really informal, we had it at a bar that was still open to the public, so there was a lot of "was that guy in my class? or he just here drinking?" going on. Plus they overcharged like whoa. $25 for pizza and free beer.

Out of my class of around 100, I think about 40 people showed up... probably 90% were married, some had kids...

I've heard our 10 year is supposed to be a lot more formal, so I'm looking forward to that one. The 5 year was poorly planned, I only heard about it I think 2 weeks before it happened, and luckily I just happened to be going back to my hometown that weekend so it worked out.