Here are some insider's tips for anyone considering attending theirs. These are all from actual events. Any resemblance to real people or events is not only intentional, it is unavoidable.
Expect for divorcees' to be hooking up with other divorcees'.
Expect that the people you remember the least about will remember the most about you.
Expect that if you begin the conversation with "where do you live now" it most likely will end with you a high pitched repetition of what you just heard..."oh, you live across the street from the high school? That's really neat."
Don't expect to remember the names of everyone in your class...even if it only had 32 people including yourself.
Don't start a conversation with "I heard your father died...question mark". It can only go down hill.
Expect to be caught in the corner talking to the people you never connected with while still in high school.
Expect to simultaneously meet and be forced to hug at least one very creepy spouse of an old high school friend.
Expect at least one stomach staple surgery patient with before and after pictures.
My final recommendation is don't go. I loved my high school experience but I think it was for that time only. Reliving it through slideshows in a crappy banquet hall with your buddies ten years later will make your inner monologue go something as follows... "How did I ever justify that haircut in the first place?" "How did I see my reflection in the mirror at JC Penney's and still go with "white dress with doiley collar" for senior pictures?" "And why in the I'm sorry hell did I decide to come back and put myself through the torture of reliving all this!?" This is the long version. Clark's astute observation is most appropriate for the abridged. Everyone is the same but bigger.