I think Tim Robbins is one of the most underrated actors in Hollywood, actually. He's done some duds(just like everyone, even Tom Hanks), but Shawshank Redemption, Mystic River, The Player, Jacob's Ladder, Bull Durham, The Hudsucker Proxy, Bob Roberts, Cradle Will Rock, Nothing To Lose, plus hilarious bit parts in comedies like Austin Powers 2, High Fidelity, and now this(ha, and "Merlin" from Top Gun). Erik The Viking was probably one of his biggest flops at the boxoffice, but I thought it was great.
Drama, comedy, musicals, Tim Robbins really does it all. He was very deserving of the Oscar, in my opinion, and he didn't use his speech to push his political leanings, like everyone unfairly blasted him for doing before the fact.