1. ROTK
2. Lost in Translation
3. X2
4. Pirates of the Caribbean
5. Finding Nemo

Honorable mentions go to The Matrix Sequels (yeah, I liked both of them, though not as much as the original), Bend it Like Beckham and Bruce Almighty.

Movies I didn't get the chance to see yet, but I would probably enjoy if I did are:

Once Upon A Time In Mexico, Bad Boys 2, T3, Kill Bill Vol. 1, The Last Samurai, School of Rock, the new Peter Pan and, surprisingly, Love Actually.