Swan
I have stayed @ the swan my last two trips to WDW - mostly because I am a member of the Sheraton/Starwood points program and so the first trip my rooms were free and the last time they were 50% off, and I get an automatic upgrade to the best available room. The rooms are very large, and the hotels
(both swan and dolphin) are gorgeous. Along with everything listed above, they also have some of the best dining in WDW, especially if you count all the Boardwalk restaurants (Flying Fish... yummmy!) - which are quite close, definitely walkiing distance! They also have nice workout facilities at the swan, but if you are more hardcore than I there is a Body by Jake club in the Dolphin. I believe they also have activities for the kids (Camp Dolphin? something like that) and are really in a convenient spot since you can walk or take a water launch to Epcot, MGM, & the boardwalk. If you have a pass that allows for multiple entries on the same day, you can actually take a stroll through Epcot and ride the monorail to MK, leaving Animal Kingdom, Downtown disney, and the water parks as the only things you HAVE to take the bus to - although I don't think you can use the Epcot to Monorail trick unless Epcot is open, so if MK is open earlier or later, plan on the bus.