lol. I was at that booth too!
I got 2 cels there but didn't get to talk to Hal as much as you did (he signed 1 of them and was busy with other people). My cels were of some super cute bad guys (not regular bad guys but some 1 ep bad guys). I will admit I was sad there was no Skeletor :(

He was the first guest that I knew and my friends didn't and was still one of my favourite panels (even though most of the planel was about Star Trek and not He-Man).