GF---for so many reasons:
1. DH and I watched the construction on our first trip to WDW before we were married when I was 20 and he was 22 and said, "Some day we'll take our kid here." We did.
2. GF was where we stayed for our son's first and second trip's to WDW. He loved it, they treated us like royalty and it is very convenient if you need to take the monorail back to your room in the middle of the day because it's little kid nap time.
3. We love the theming. It's so beautiful and classic. Everything is pretty without being over the top or too cutesy. In spite of claims that it is 'stuffy" and "snobby," we've always found the GF very easygoing and child-friendly. The lobby is perfect when you're sitting and listening to the pianist play Disney tunes. It even smells nice.
4. It's not too big. GF has the smallest occupancy at WDW. You never feel like a number.
5. CMs who go above and beyond. I have never received more pixie dust than I have at the GF---room upgrades to CL and TPV, flowers and champagne on our anniversary, hand delivering our La Nouba tickets to our room, refunding the cost of my parents' breakfast at Grand Floridian Cafe after they misread the CL breakfast hours at RPC, giving us a ride back to the WL when we were only dining at the GF but missed our transportation back, and most important of all, working directly with us to find a noise-free room during construction, so that my son, who has autism, would not be upset by the noise.
6. Amazing dining options. We especially like Narcoosee's and 1900 Park Fare.
7. Great opportunity to watch the fireworks from the dock or beach.
8. Excellent transportation. We love to take the boat back to the GF from MK.
Rooms aren't always available at the GF and they aren't always affordable for us. I also have a desire to stay at all the Disney deluxes, so we do move around, but the GF is the resort that we think of as "home."