I really don't know what else to say. I never met anyone who didn't like Paul Newman.
Looking at his filmography, I get the odd impression that he was one of those stars who did his best work for directors who weren't quite in the first rank. (Robert Rossen may be an exception, though he made so few films that it's hard to say where he ranks.) His collaborations with superstar directors -- Hitchcock, Scorsese, Altman, Huston -- were rarely his or their best, even if he did win an Oscar for the Scorsese picture. But with solid middle-of-the-pack, non-superstar directors like Stuart Rosenberg (Cool Hand Luke) or George Roy Hill (Butch Cassidy, The Sting, Slap Shot) or Martin Ritt (who made a lot of successful movies but was never really a star director) he made his best-loved movies. I think he may have been most comfortable with a director who was his equal, not his boss, on a project that was his as much as the director's. An exception: he should have worked less often with Jack Smight, whose hackiness made the fine script and cast of Harper count for surprisingly little.