Gladiator is 100% entertaining. The story was great and the music was *perfect*. My favorite movie. Hans Zimmer is also the musical genious behind the The Lion King and The Prince of Egypt.
I also loved Road to Perdition...I can't think of a more satisfying film.
Aliens: Director's Cut - Kick-ass! (if you don't mind the Cameron-ism)
Terminator 2 (#1 action movie)
Fight Club is just freaking awesome (though offensive to some).
I can understand why many people liked Forrest Gump, but that movie was just too sappy for my tastes. Still, MUCH better than Titanic in my opinion.
I don't want to see anyone else say "Memento"...that movie is stupid and based on a lame gimmick.