The Poly is very relaxed and quiet on the grounds and in the longhouses. The GCH is NOT. Dining is very popular there, and it's all in a cluster, so the mornings and evenings are very busy and loud.
I haven't stayed at the GF, but we've dined there a couple of times and it seemed very nice. The lobby didn't get as loud as the Poly's, with people waiting for ADRs, and the band is great. I REALLY want to stay there but budgeting it would be the challenge for us, too! Beautiful grounds, if not as lush as the Poly. Love the Monorail, the restaurants, and the vibe.
CR is everyone's favorite, in my house. The rooms are huge and TPV really IS of the park. We were on the opposite side from Chef Mickey's, so noise wasn't an issue. Lovely large rooms, great location, two beautiful views if that's important to you (we didn't think it was, but we were out on the balcony constantly and will never forget it). We loved The Wave for breakfast. The Monorail had no problems during our stay and we utilized it often (like a ride for my kids, lol). CS was easy, as I hate dealing with different bays with young kids who don't agree on a cuisine. You don't have that issue, though.
We're planning for next summer and looking at BC/YC. I'm pretty sure SAB is anything but relaxing, however the location is wonderful. Rooms are smaller than the above, so we're trying it out while the kids are smaller, too! Love the option of going over to BWI to watch evening entertainment or dine, the plethora of dining choices at 5 different resorts, and easy access to two parks. I'm hoping the quiet pools are actually pretty laid-back, with the popularity of SAB pulling most of the guests

...and that my kids will just be happy with any pool when I need to come down off the buzz of WDW!