I vote VGF (but liked Poly too!) I love that the feature pool is right there at the VGF villas as well as the spa and fitness center. I love the bubble tub in the bathroom and I love the fountain and espresso machine in the lobby. I love to go to the main hotel and listen to live musicians (piano, orchestra) playing disney songs. I love the restaurants at both but there are more to choose from at VGF. I have a family of 5 and I LOVE that I have the option of choosing a studio, 1 bed, 2 bed, or 3 bed villa which will ALL sleep 5 or more. (It gives you a lot of options if your first choice in room size isn't available and gives you options if you are short on points). I love the GIANT walk in closet at VGF in the 1 bedroom villa we stayed in last fall. I love the covered walkways outside! (I have been drenched MANY TIMES at Poly during a downpour trying to get several buildings away back to our room). I love to go to the VGF lobby and check out movies to watch on the DVD (You don't have to go to the main hotel for this) - great option for a rainy day.
Poly has cooler bars but the bars and restaurants are SO CROWDED THERE it can be difficult to walk through that lobby. Grounds are beautiful at both. (And I love that Poly is a beautiful 4-5 minute walk away from VGF). Poly has the option of better views as well but I love the standard view at VGF. If I was buying for studios only, I might have chosen Poly. Poly has better monorail access - you can walk to the Epcot monorail at TCC as well as the Magic Kingdom monorail (however we walk to TCC from VGF too!) All in all, we love our 1 bed villas at VGF and are thrilled we own there!