Definitely the "Happiest Place on Earth"! Take 2 days to the Magic Kingdom. There is so much to see! Also get a copy of Birnnaum's Disney if it's your first trip. Tons of useful tips on what to do!!
Go in January for marathon weekend! A fun way to make your way through all the parks (plus ESPN's Wide World of Sports) in one morning.(If you're a Gatorade drinker, pack it! Disney uses Powerade.)
It's a magical place! Be on main street after the electric light parade for the show projected on the castle, amazing! And stay for the fireworks, you won't be disappointed...Magical
Try the boardwalk or beach club hotels for easy access to Epcot. Try the Poly for access to the TTA and the Magic Kingdom. Victoria and Alberts = best restaurant in the universe: