it really depends on how you act around him. His moods can varry though. If your just chill with him and don't bring up every little invader zim or squee related thing your pretty cool in his books anyways. We were just sittin around and were all like "Ey! jhonen! " and he just gave us this confused look but wandered away from his table. It was either us hangin out on the corner or a bunch of screaming fangirls/boys. That would get on anyones nerves ne? We just talked a bit about nothing in particular like what he liked at con and where he got his awesome boots xD he seemed pretty nice actually once you got him away from the crowd.