I'm not as familiar as GoR as with his solo stuff, but know they were a tempestuous bunch - there's a book about Chuck/Green On Red (called What Makes The Monkey Dance), that was published last year. Not got round to reading it yet.
His voice (spoken and singing) is very nasal. I like to describe him to people as the 'bargain bin Tom Petty', which isn't really accurate (nor an insult, in my eyes anyway).
He's a great guitarist though, and he just makes it look so effortless. Usually with a big, fat grin on his face too. Actually, that's one of the other things I love about him, there's no artifice of the tortured artist, he looks like he's having a great time and he that he thinks you should be having a great time too.