Yeah, he's totally just a regular guy. I think he's a little uncomfortable with people constantly telling him how awesome he is blah blah blah. The first time I took Heidi to see them, after the show, she went up to him to tell him the story about how she first heard the band - we were taking a trip to Philly, and during the drive, I played all of Act II for her and sort of narrated the story between songs. Casey's reaction was: "Oh god... you must've been so bored".
He's much better with bitterly sarcastic humor than genuine appreciation, so I just try to stick to that
.
For example, after the show in Cleveland, we were all hanging out outside the venue after the show, and we were split up into two groups. Casey was in the group with me and Kyle (Lachryma from LatR), and they started talking about the LatR chatroom, and Kyle was like "How come every time you're in the chat and then I come in, you just disappear immediately after I come in?!?", so Casey's response was to just look at him and say "Oh yeah? How 'bout this?" Then he just got up and walked away without another word and went to hang out with the other group. And he didn't come back.