IOA is a park like no other. Your eyes get no relief from visual stimulation. Everything is so well themed and the attractions are really top notch.
I've talked to several people that have been to IOA and not been impressed. Then I proceed to ask them. Did you ride the Popeye Raft Ride? Jurassic Park? Dudley Doo Right Flume? Poseidon's Fury? Did you eat at Mythos? Did you ride in the front seats of Dueling Dragons?
When I ask the IOA nay sayers these questions the response I get is, nope didn't do that.
IMO, you *can* visit IOA and not do Hulk and Dueling Dragons and have a great day if coasters aren't your thing. I understand some people just don't do coasters --- I'm not one of them. However, if you visit IOA you simply must do the water rides.
Popeye's & Bluto's Bilge Rat Barges (rapids ride) is like nothing else --- Disney's Kali River Rapids doesn't even come close. Did you know that this ride has a patented mechanism that sends the rafts over a waterfall? It is unbelievable!!!
Jurassic Park is a great ride and extremely well themed. The animatronics and the big guy right before the drop are great.
Dudley Doo Right is a good water ride. I think it comes in a close second to Disney's Splash Mountain (mostly because you don't sit side by side). The final drop is such a blast.
We're heading back to Universal Orlando the first week of January and will be riding all the water rides --- regardless of the temperature. How, you may ask? The magic of disposable ponchos from
WalMart/Target. Generally costing less than $1 a piece, these little guys will fit in your back pocket until needed, and allow you to enjoy the water rides without freezing to death or being miserable for the remainder of the day. After you hope of the ride, drop the poncho in the trash, or save it for the next water ride just around the corner.
Of course when the temperature is 90+ degrees, we leave the ponchos at home, but we always take these guys with us if the weather isn't water ride friendly.
Also, in my experience, the parks generally tone down the "extra" water features during the cooler months. Yes, you'll still get wet, but you don't have tons of water hitting from sprayers, overhead buckets, etc.
Try IOA, you won't be disappointed --- Spiderman, Hulk, Cat in the Hat and the other rides I mentioned are top notch. Disney should be jealous.
Good luck with your trip.