Wow, Gen Con pretty much rocked my world.
I learned a lot. I got to playtest Grey Ranks with four young turks who gave me a ton of useful feedback, and I got to meet many friends in person for the first time. We sold a lot of Roach and some Drowning and Falling as well. Working the booth was very satisfying and I had a great, exhausting time. Expect big GR revisions as well as a flowering of exciting new ideas based on actual play and discussion at Gen Con.