From favourite to least favourite:
1. Epcot - easily my favourite theme park anywhere, and quite possibly my favourite place in the world. Has a magic all its own.
2. Magic Kingdom - what is there to say that hasn't been said already? My favourite of the 'Disneyland' style parks - less rammed with attractions than the Anaheim park, with a far superior castle and an overall magical atmosphere.
3. Disney's Animal Kingdom - I fail to understand most criticism of this park - a worthwhile attempt at something different, and E:E, Dinosaur, Kali River Rapids, Festival Of The Lion King etc. are all excellent attractions. What's not to like?
4. Disney-MGM Studios - My least favourite Disney park, and I still love it! Needs work in places though - my three main reasons for going there are ToT, R'n'RC and Fantasmic!
5. Universal Studios Florida - Does a better job than MGM of being a movie-themed park, with several classic attractions like T2-3D (an all-time favourite of mine), Jaws and Back To The Future (rest in peace). Plus, the recent Revenge Of The Mummy rivals Disney dark rides in quality. A solid park.
6. Islands Of Adventure - I love Hulk, Jurassic Park, Dueling Dragons and especially Spider-Man (although I prefer Dinosaur for some odd reason...). A good park that just doesn't come close to reaching Disney standards.
7. Busch Gardens Africa - If you love coasters, this is the park for you (SheiKra is amazing!). If you don't, save your money...
8. SeaWorld Orlando - A good day out, but needs a few more rides to make it truly worthwhile as a theme park. Kraken and Journey to Atlantis are favourites.
Overall, as much as I love all these parks, I will always be biased towards Walt Disney World. There's nowhere like it!!!!