Which theme park among these is your favorite Disney World, Busch Gardens, or Islands of Adventure? and why?

I've been to all three (well all four if you're counting both of the Busch Gardens parks) and Disney World is my favorite because it's a truly magical place. Both Busch Gardens parks are well kept and tons of fun, but they're not quite up to that Disney standard. At Islands of Adventure, Dueling Dragons is one of my favorite roller coasters. Plus they have my favorite ride ever, the Spiderman ride, and the Dr. Seuss land is whimsical, but there's not as much to do there.