His stuff with the Ozz is good but I hate Black Label Society. They're like the most white trash band in existence, hell I like Pantera a lot, but BLS take it to a ridiculous extreme.
I don't really like his guitar playing even if his skills are impressive, his riRAB are terribly generic and his solos rely heavily on ornaments (which today are metal cliches) to mask the fact that he can't really write very good hooks or melodies, nothing wrong with flashy solos (being a Van Halen fan) but his excessive use of vibrato and pinch harmonics is overkill I think.
I also strongly dislike him as a person. Mainly because he's a hateful, sexist, racist, homophobic douchebag.