What CamColt said!
The grounds are so tropical and relaxing, you feel like you really are at a resort in the tropics. The Polynesian is not just a place to sleep, it feels like a vacation destination in itself.
Strolling the grounds after dark is a special treat- you have the subtle tropical music emanating from the lush tropical landscaping, and the tiki torches placed along the meandering pathways add to the "away from it all" feeling.
Sitting on the beach at night and digging your toes in the cool sand while watching the MK fireworks across the lagoon is the best way to end the day.
Transportation!!! There are so many options to get around from here. I don't think there's anywhere else on property that's so convenient to so many parts of WDW.
Being able to look across the water and see the castle in the distance is magical. It gives my heart a little thrill every time I see those beautiful spires. Deep in my heart, I guess the castle represents the magic that is Disney.