He is so frickin' awesome. Its just too bad that he bites it in the beginning. His entire dialogue tree is awesome. I couldn't help but laugh with each response. I even went so far as to reload from when I first enter the cave twice just so I could talk to him again.
Is it bad that after his head got blown off I picked his corpse up and carried it around for a while screaming, "NOOOOO!!!! YOU BASTARDS!!!"
I also enjoy Follows-Chalk although I do wish I could answer his question of, "Why do you carry all those bottle caps around anyway? They jingle so loudly." (Or something to that effect).
Who is your favorite?