We've only stayed at SSR (home resort) VWL, BWV and BLT. Also stayed at VAK before it became DVC. And of course we're ridiculous looky-loos who have visited all the other WDW DVC resorts or dined there...
I'm going to take the controversial position that they each have something going for them (in your face, societal expectations!). I'd stay at any of them and not pitch a fuss, but my personal favorite is Bay Lake Tower, for all the reasons others have described. Great location, not only close to MK and the monorail to Epcot but four other resorts accessible by monorail or boat. Plus being so close to TTC and MK you're also by a hub which make it easier to go direct to other resorts if you want to without using your own transportation. I like how the new 1BR units there (and at VAK/VGF) have the additional bathroom in the 1BR units which we usually choose. If we went for studios I'd probably pick VGF for the extra bathroom, but we like getting a bit of privacy from the kids for late night Scrabble sessions and charades

My wife prefers SSR because she likes a bit of a respite from the thee park madness, but she's keen on BLT too. She didn't like BWV, she did like VWL and she has no desire to try BCV (despite its great location) or OKW. I'm sure I can twist her arm to try VGF one day, and the Poly when the time comes. And she loves, luuuuu(insert however many of the letter 'u' you think constitutes a lot)uuuvs Hilton Head.