I love the Poly
I have been lucky enough to stay at all three several times. I just actually came back from staying at the Bay Lake Towers (almost bought some points there, but gotta pay for a wedding first!). Personally nothing beats the poly for me. The landscaping, the ambient lighting at night, the views, you cant go wrong. I tend to stay in the tahiti building with a lake view.
There definately is nothing wrong with gf or the the contemporary, but I dont get that same vacation feeling that I do at the poly. After a long day at the parks I love to just find a quiet spot at the poly with a glass of wine and the fiance, and enjoy the castle view. I know we all have our favorite hotel for all valid reasons, mine for the poly is just that feeling of pure relaxation.
As far as resaurants, cali grille is my favorite(contemporary) for dinner, I love Konas(for breakfast and lunch especially), and citricos is where I'm having my wedding reception(awesome of dinner). So as long as your in one of those three, you really cant go wrong. I would go with your gut, and no matter what one you choose, take full advantage of the perks.
Just on a side note, if you choose BLT, I would recommend the bay view. We had the castle view and it really wasn't all that impressive. You had to look past the parking lot and it seemed to have lost some of its luster. I think if your at the poly or grand, then thats gotta be the view, but at BLT def not a preferred one, in my opinion. :wave::wave::wave: have fun!