We bought VGF and are extremely happy with the choice. You will not regret it!
We go during busy spring break and I don't find the pools are mobbed. And if you're staying in a 1 bedroom, you will have your own gorgeous, quiet lobby that is never busy like the main lobby. The rooms at VGF are exactly my style. They feel luxurious. Cannot say the same for other surrounding resorts.
Aside from the beautiful theming, the easy transportation is the next best thing.
I love the Poly but it is even busier than the GF. It's great to be close enough to pop over for a meal but not be staying there. We would never stay at BLT. It has lower and cheaper points for a reason.
Dining options are INCREDIBLE. My advice: get enough points for a 2 bedroom so grandparents and guests can come along. Date night at Narcoossee's or Citricos while your kiddos are watched by a relative is priceless.