He is very personable and friendly, or at least he was when I saw him in VA. He even remembered the names of some of the fans he'd met at a convention a year or more ago. You can get him and Gaiman to play write-the-note games at booksignings, sometimes.

I wouldn't even call him dry. Maybe in comparison to somebody bouncing around like a retarded meth monkey, but he was very animated when he did the booksigning in Virginia and that's when he was jet-lagged.

*end gush*