I've actually got annual passes to all three parks in Orlando (hey - someone's got to think of better things to buy as presents for 44 year old single men for birthdays and Christmas
), and I like all three, although I'm a recent convert to Universal.
I recently spent some time with friends staying at the Royal Pacific Hotel, which had the great advantage of giving unlimited Express Passes for the length of stay (will Disney do that?). I definitely noticed changes in UO, which were for the better - Twister, T2-3D and Men in Black are great. Even Kongfrontation seemed to have improved since my last visit 18 months ago, but it's closing for good in a few weeks' time. IOA has great rides, but I must admit that Jurassic Park is much better in Hollywood. In fact Universal Hollywood is sooo much better than UO - there's simply no comparison.
Still, for the atmosphere, and the whole 'experience' WDW still is much better - it just seems right, while Universal isn't - I can't put it into words.
Finally, Universal can't do the entertainment right - the fireworks are pretty poor in comparison with Disney's, and the other shows at WDW are so much better (although I haven't seen Poseidon's Fury yet).
Areas for improvement:
UO - look what they do at Universal Hollywood (shame they can't import the landscape, however)
IOA - not a lot really, although the fireworks could stand an upgrade
MK - get rid of Space Mountain, and build a copy of Disneyland Paris' ride; do something with 20,000 Leagues lagoon
Epcot - The Living Seas - what is it all about any more? Change Tapestry of Dreams PLEASE
MGM - Star Tours 2, please
AK - actually, I think it's underrated, but BK would be a welcome addition.
Sorry about the rant, but in closing, what to thrill-seekers think of Kraken and Atlantis - I honestly think they are better than most other rides in Orlando.