I liked Long Halloween. Dark Victory was ok. Daredevil: Yellow was good. He had one or two good issues in his years on Superman(Rob did a review of one of them).

Everything else he's written I've either not cared much for, disliked, or just downright loathed. For all Seasons was decent, but nothing new or interesting for me. Spiderman: Blue was crap. Loeb's run on Superman was, overall, crap. OWAW was the worst crossover storyline I've ever read. Hush was terrible.