I don't think I've tried ranking parks yet, and I've visited few enough that it should be easy. Let's see...
1. Magic Kingdom. It has its flaws, and it's constantly chock-full, but man what a park it is. It's clear everywhere you look that the company is fully committed to justifying the price of entry to this place. The themeing is superb. The ride lineup is varied. The attention to detail is not matched by any park I've ever been to (granted, it's not an impressive list). Overall, the place is hugely enjoyable. A park of great quality. Despite the creep factor.
2. Liseberg. Another park that has shown some real commitment to quality recently, even though it doesn't have the near-unlimited budget or expansion room that Disney has. It's situated in the middle of a city that's just big enough to give it constant traffic and good income. It has a genial two-tier pricing system (cheap entry for those who don't want to ride anything, additional mark-up for wristbands for the rides) that makes it suitable for all kinds of families. Its development policy is also admirable, focusing on one section of the park every year. It's not afraid to make investments, even in areas that work just fine already. It has built some really nice coasters and pretty good flats too. It's a park I expect to deliver quality for decades to come.
3. Legoland Billund. Yeah, it's a top three park for me. My list, my rules. I grew up with Lego and still take out some bricks and build from time to time. Legoland was a must-visit on Denmark trips with my family when I grew up (there's no Norwegian holiday pastime so well-honored as a car trip to Denmark). The awe-inspiring creations in Miniland alone is worth the entry ticket for me, and the attractions aren't half bad either. I also believe this park has one of the best water ride lineups in the world. The log flume is a highlight of every visit.
4. Epcot. I think I could easily have spent a day here without going on any attractions, just looking around at all the nice things. There's so much to see, and hear, and smell, and taste. The themeing is very varied (is Epcot the park with the highest number of themed lands?), the foliage is well-maintained, the view of the lake is spectacular, and it's way less stressful than Magic Kingdom.
5. Universal Studios Florida. Another nice park, whose image and rides pack a little more punch than Disney. The themeing is still nice, and the park looks gorgeous, although I think it lacks the charm of Magic Kingdom. Still, it's a place I'd like to return to one day. The Diagon Alley section in particular is absolutely amazing.
6. Disney's Animal Kingdom. It has jumped a bit on my list after my recent revisit, as I think Avatar Land really bolstered its lineup. The queues are horrendous in that section of the park, but Flight of Passage is an amazing ride. It also has Dinosaur and Expedition Everest among its memorable rides, and for some reason I really like the safari. The river rapids are nice too, if a little short.
7. Kongeparken. This one is the odd one out, I guess. This little park in the southwest of Norway doesn't have much in terms of coasters, but it's very nicely themed and its flat ride lineup is great. Unlike TusenFryd, it actually makes investments every year, pretty decent ones too, and it's clear that they build as good as they can, instead of as little as they can get away with. The level of commitment to development really impressed me. I suspect many of the rapid changes in its lineup is due to leasing, however, as the flats tend to be of the portable type and only stay in the park for a few seasons.
8. Ferrari World Abu Dhabi. I visited before Flying Aces opened, but Formula Rossa was still awesome, Fiorano GT or-whatever-it's-called was enjoyable, and the dome itself pretty cool as well. It had a little too many simulator rides, but the park clearly had great potential. Besides, it's not like I have any other park to place in here.
9. Thorpe Park. I haven't been there since '09, and we were dumb enough to go during a bank holiday so the place was absolutely packed, but I remember it being a pretty cool place still. Its coasters were decent (that is, the two we got to ride, plus Flying Fish), the flats were great fun, and there was a lot of foliage that made the park pretty lush. Not a bad park at all, really, I hope to go back one day soon.
10. Disney's Hollywood Studios. It's another very nice park, certainly above the three or so other parks I remember well enough to form an opinion about, but as of my last visit it is the weakest of the big four parks in Disney World. Tower of Terror is awesome, Rock'n'Rollercoaster is nice if a little dated, Toy Story Mania is fun except the ungodly long queue, and... well, that's the issue. There's not a lot more to do there. Frozen Singalong is charming, Indiana Jones Stunt Show is cool, and Star Tours is also neat (bonus points for having a full-scale AT-AT outside the entrance), but as far as rides go it's a bit bare-bones at the moment. That being said, with Toy Story Land and Star Wars Galaxy's Edge opening, the lineup will probably be buffed out a bit more.
Honorable mentions go to:
- Islands of Adventure. The park closed a couple hours earlier than anticipated, so I only got to experience the Hogsmeade area. It was really cool, but I never saw enough of the park to get an impression of the place as a whole.
- Djurs Sommerland/Fårup Sommerland. I've only been to both places once, and both trips were many years ago. I don't remember them well enough to rate them properly.
- TusenFryd. A park that did a lot of things right until the rotten Parques Reunidos takeover in 2007. Throw the dirty scum of a company out, I'll gladly provide torches and pitchforks, and the place will probably be up to shape within a few seasons.
- Kristiansand Dyrepark. A Norwegian park/zoo without coasters, but pretty awesome themeing. It's actually the biggest and most visited park in Norway, but a little off the radar for CF purposes. Alas, I haven't been there in over 20 years, so can't really rate it. It's a great place to bring kids, though, so maybe I'll go there again in a few years.
- Berjaya Times Square Theme Park. Absolutely WTF themeing, a good-looking if dull coaster, and probably some other rides we didn't bother with. Only spent an hour or so here, and it was nice enough, but not a place I'll rush to revisit.
That's pretty much every park I can remember going to. At least at this time of the evening. Don't think I've missed any significant ones, though.
