I very much enjoyed the Allerton Conference again this year.
The highlight for me was the sessions on Networking Games and Algorithms. Bruce Hajek has been organizing excellent networking sessions for years, and I think this year the focus on network games really paid off and led to some very compelling sessions. I arrived to hear Ramesh Johari, Vijay Vazirani, Tim Roughgarden, and David Kempe all give great talks back-to-back. I'm expecting they'll have a similar set of sessions next year, hopefully expanded!
A small disappointment was that there seemed to be fewer talks on coding theory this year. Plenty on network coding, but very little on standard coding theory. (This may have to do with Ralf Koetter recently leaving UIUC; in any case, many people I usually see there, like Muriel Medard, Ralf Koetter, Michelle Effros, Alexander Vardy, and so on didn't seem to be there.) A top coding theorist who was there independently confirmed this impression; hopefully, things will be back to normal next year. This year, I'm glad the network games sessions kept me so busy.