Maybe I don't belong here...we actually prefer CR.
I'm big on convenience. I love the convenience of CR. Especially if it is raining, very hot, or ver cold. you can go from your room at CR to ANY monorail dinign in minutes with minimal outdoor exposure. It's huge plus if you want to arrive at dinner wearing nice clothes and want to still look nice upon arrival.
At Poly, I disliked that we had to go down, outdside, and up again to get to the monorail. (It was especially annoying with a stroller in the pouring rain)
My considerable preference at CR is actually Bay Lake view. It's so pretty, you get a great view of the water parade, the pools, and you can see a tidbit of Epcot. But then we usually stay club level, so if we want to see the fireworks we just head over to the lounge . (plus, before ten pm, you get desssert!)
Admittedly, Poly has better theming. You can easily visit Poly for dinner. We also really like 'Ohana - but truly the trip from a room at Cr to Ohana is just about as fast as a trip from many rooms at CR - so long as the monorail is running.
No matter which - DO check the monorail service before you go.
As for GF, our last stay was in the outer club building. Other than the monorail interuptions - we really did not see the construction AT ALL. Really. I never heard it or anything. I don't even think we could see it from the slide pool.
On the other hand...BC is also REALLy nice in the summer. The pool is amazing, and BC is convenient to TWO parks.
Maybe try a split stay. That way, if you don't love either, you are only there a few days. The only trick is your second resort has to be room only. You can do your first four night stay as a package wiht dining and tickets (get the tickets for the full seven nights). Stay at BC. Go to Epcot, HS, and the resort pool. Eat in that area. Do the last three nights as a room only at CR. Stay 12th floor club level, Bay lake view. Go to AK and MK those days.
the best of both worlds! Disney will even transfer your luggage (all you pay is to tip bell services) We've done this and it was lots of fun! then again, I enjoy trying different resorts. They all have pros an dcons- I like discovering them.
Truly I liked CR much better AFTER I stayed there than before.