Here are some of my favs:
Transformers (I ABSOLUTELY LOVE the theme of the Autobots first arriving on Earth. Kudos, Jablonsky!!!!!!!!!!!)
The Mask of Zorro (so romantic and thrilling, great use of Spanish music and tap-dancing! Also keep your ears peeled for some jaguar growls!)
The Incredible Hulk (the romance theme for Bruce and Betty absolutely rips me to pieces...)
King Kong 2005 (the scenes of Kong being subdued on Skull Island's beach, his sickeningly poignant antics on the ice pond, and the entire Empire State Building sequence makes me practically flood my room with tears)
The Mummy (wonderful romance theme for Rick and Evey!)
Spider-Man 3 (I'm referring to, of course, the reawakening of Flint Marko after the accident when he reforms, and the death of Harry Osborne)
POTC 3 (the death of William Turner, the death of Davy Jones, the death of Weatherby Swann, the death of James Norrington, Will and Elizabeth's last day before he goes off to perform his ten years of Captainship, Elizabeth's goodbye to everyone as she leaves the Black Pearl, etc. One of the greatest film scores of all time.
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Hellboy (Red and Liz's love theme)
KOTCS (the marriage of Indy and Marion)
Star Wars Episode III (the unforgettable Order 66 sequence, Immolation, Rise Lord Vader, Battle of the Heroes)
Iron Man
The Dark Knight
Series of Unfortunate Events
Superman Returns