Planet Terror (nowhere near as good as most of the movies I've seen in my life, despite being kinda funny), Evil Dead 1 and 2, Mission Impossibles 2 and 3, and probably any movie with Leonardo DiCaprio, except for Gangs of New York (exempted from the rule because Scorsese directed it.)
Underrated films, however, included Death Proof, The Hunted, Gattaca and Collateral. Seriously, I've just concluded that Death Proof has probably one of the top ten movie soundtracks of all time.
And Batman Begins wasn't a bad movie, but it didn't feel at all like a Batman movie. The first half of the movie could have been renamed "Ninja Gaiden: The Movie" and made just as much sense.