worst: being to my first large con when my pain levels were high enough I needed a wheelchair. I missed out on meeting with several VAs because everyone was swarming the elevators and wouldn't allow me in on my wheelchair, getting two knuckles dislocated when I did manage to get in an elevator when two guys pushed in past me ramming my hand against the door because they wanted to make sure they could get in while there was still room for them, getting rolled/pushed out of the way by people in the dealer's room while trying to buy stuff (I say rolled/pushed because I was getting my wheelchair shoves hard enough it moved even when I locked the wheels).
best: meeting friends, having a long chat with and getting hugged by Tiffany Grant (it all started with me mentioning I really loved the job she did in Blue Seed voicing Koume), making random new friends while there (some I started talking with online, others I pretty much only talk to at the con I regularly attend but we get really chatty when we do talk, one friend I made at a convention loves that I so far have recognized every cosplay she's done since she tends to do stuff that ranges from slightly obscure to very obscure)