My son (age 14) went to US/IOA on a non busy summer day with his cousins, so got to go on almost everything, but he didn't really care for the parks either. The last time I was at Universal was before he was born (I didn't care for it then, but heard it's much improved now), and I've never been to IOA. His very favorite park is Sea World (He's a huge marine mammal fan) and his second favorite park is Cedar Point (We just love coasters, but aren't that into indoor themed rides -- We get to Cedar Point at least every other year). Just letting you know, you are not alone in not being enamoured by the US/IOA parks. My nephew on the other hand who just loves Cedar Point too, loved US/IOA -- his favorite parks in Orlando. There are many different tastes and preferences even in the same family.
Anyway, my son and I will be going to IOA next year just to see the Harry Potter theming. I went though all the rides and attractions with him and all he wants to do (I let him pick our touring plan) was 1) all the HP rides (including both tracks of re-themed dueling dragons), 2) the Hulk, 3) go into any HP stores, etc. --see the HP theming, and 4) go to the Jurrassic Park Discovery center. There wasn't a single thing at Universal he wanted to do again, so that makes it easy to decide to just get the admission for IOA on our next trip.