Anything labeled "Adult" at an anime con sucks. Did you check out the "quality" "adult art" on display? It had a penis with teeth attacking an orange and a photo spread of an unpleasant-looking woman. It had drawing of a woman with a devil-spade tail tail-fucking herself while sucking the penis of a man whose penis was attached upside down to his body. There was a drawing of a woman having sex and supposedly having a great time, except for the look on her face, which said, "I'm bored."
There were, maybe, two? or three? pieces of the "adult art" that were worth looking at, and none worth buying, seriously.
The regular art, though, there was some neat stuff; and at the artists' booths, I ran into Dark Kitten and Bar-1, Bill Holbrook and Scott Ramsoomair. Plus a creepy guy who used handwritten signs to flip through his sales pitch for a really cheesy manga.