Obviously on a Disney board we can assume that there will be a huge bias towards those parks, but at the same time we've been to them and we know better. We know the difference between Disney and a Six Flags park. But do a top 10 ranking anyway:
#1 Disneyland - About as perfect as a theme park can possibly be. Walt knew what he was doing and this is a part that has been emulated but never duplicated. The happiest place on earth, you bet.
#2 Magic Kingdom (WDW) - I was a lifelong WDW veteran and I had never been to Disneyland up until last year. I couldn't imagine a park eclipsing the Magic Kingdom but Disneyland did. That being said, this is still a strong #2 in my book.
#3 Islands of Adventure (Universal Orlando) - You only live once, and you should never miss this park. Lots of rides like the Hulk, Potter, Spiderman, Jurassic River Adventure, etc. Even Dr. Seuss' land is nice.
#4 DCA - Yeah that's right, I'm putting it here. I know it was the butt end of the joke for a long time but my first time going was 2012. Carsland is amazing and very immersive. Radiator Springs Racers is a wonderful ride. Then everything else falls into place. Lots of great attractions: Toy Story Mania, TOT, Grizzly River Run, Soarin, California Screamin'. Not to mention the Aladdin show was amazing. To top the night off we see World of Color. What a way to end it.
#5 Epcot - Sort of a log jam for me with #4-8 so it isn't like one is much better than the other. With Epcot as I got older I appreciated it more. There is nowhere else in the world quite like it.
#6 Disney Hollywood Studios - There could be some improvements to it but it still remains a park blessed with some Disney mystique. It has the better version of Tower of Terror.
#7 Universal Studios Orlando - Hard to imagine a park that has actually slipped behind its sister park but that's the case with it. It bothers me a bit that they have ripped out much of the original rides (Kongfrontation, Jaws, Back to the Future) but it is still a great park. Still find E.T. one of the most immersive rides out there.
#8 Animal Kingdom - Don't think it is just a simple zoo and nothing more. Couldn't be farther from the truth. It is a zoo with a Disney touch to it. A few good rides too (Everest, Dinosaur) even if they could add some more. But the Tree of Life is a sight to behold. You could spend an hour literally just looking at the carvings on the tree.
#9 Cedar Point - Definitely my favourite non Disney/Universal park. It is a candy store for coaster enthusiasts. Still considered the mecca of all rollercoaster parks. It'll wear you out. The only knock is that the theming isn't Disney of course and the lines can be atrocious.
#10 King's Island - Very much Cedar Point's little brother. Has some nice coasters and intense ones. The best wooden one I've ever been on was the Beast, bar none.
HM - Universal Hollywood (the tour was amazing but the attractions are lacking and the escalators took a while, still worth a visit)
Sea World Orlando (Overall great park)
Busch Gardens Tampa (Supposedly the one in Williamsburg, Virgina is nicer)
Never been to Knott's or Magic Mountain yet.