My time there was limited, but there are a few things I regret not finding/buying this year...
-MISB G2 Optimus Prime (there were 2 but I ran out of money)
-G1 Scourge (saw 2 but they were too expensive)
-G1 Blurr (forgot to look for that one)
-some G1 Minibots like Wheelie, Warparth, Cosmos, etc. (forgot to look for those)
-the Movie 1 Cyber Slammers that I'm missing (Brawl, Barricade, Ironhide) (forgot to look for those)
-Generations DLX Drift (they were all gone)
On the other hand, I wasn't expecting to find Macross stuff there and I was more than happy to come across a "chunky" VF-1J reissue, I think it's my favorite purchase from the con! Just love the transformation and the die-cast. I think I like it better than my 1/48 version...