Actually, I liked Spicoli in FT@RH. Hilarious character and I knew people like him even though we were thousands of miles from the California coast.
I also liked Penn in Gangster Squad as Mickey Cohen.
Those were, keep in mind, fictional characters. Sean Penn IRL is a douche bag. Just as I like a lot of the roles that other Hollywood libs appear as, I know that we'd never see eye to eye on anything.