Yep, I LOVE Universal, my dad has a second house in Orlando and I've been to all the parks down there. I fly down and stay for 2 weeks every year, and have been doing so for the past 6 years. Anyone who hasn't been, GO!
In Universal my fave attractions are Back To The Future and Terminator 3D, and Mardi Gras is great. Nickelodeon Studios is great too, I was there once when they were shooting Slime Time Live, that was neat. I was much more interested in the technical aspect of it than the actual show, it's really neat to see the crew doing their work. But man do they fight over stuff as soon as they go on commercial break! lol But if you go down, spend some time there and see as much as possible, Islands Of Adventure should not be missed, man: Spiderman 3D, The Incredible Hulk, Dueling Dragons, etc. Swell stuff!