Too many to name, but these are from the top of my head.
1) Spirited Away
Amazing on every level. The animation, the story and the characters all flow in together nicely.
2) The Iron Giant
I had absolutely no idea that Brad Bird directed The Iron Giant before I watched The Incredibles.
3) Mulan
My favourite classic Disney animation of all-time.
4) Fullmetal Alchemist the Movie: Conqueror of Shamballa
Started off slow, but then it started to get better. Great ending to a great series. The action is mind-blowing. The ending saddens me, knowing that it's truly the end.
5) Over The Hedge
Wow. Just...wow. Over The Hedge had me cracking up from beginning to end. Dreamworks really out-did themselves. Way better than the first two Shrek movies, IMO.
6) The Incredibles
A great fun family superhero flick. The pacing, action and story are perfect. I wouldn't change any of it.
7) Titan A.E.
I'd put this in the Top 5 if there were room. It had me hooked on as soon as it started.
8) Family Guy Presents: Stewie Griffin - The Untold Story
Laugh-out-loud hilarious. "Go...away...fat man." Just brilliant. Stewie Griffin is my master. I will be by his side all the way to his world domination.
9) Howl's Moving Castle
10) Atlantis
11) Toy Story 2
12) Toy Story
13) Treasure Planet
14) Monster's Inc
15) Aladdin
16) A Bug’s Life
17) Shrek 2
18) Tarzan
19) 101 Dalmations
20) Shrek