We love BCV, though it's hardly an objective judgement as we've not yet stayed at any of the others. I would like to try some of the others, but we make our 11 month reservation, and at 7 months nobody wants to switch!
We love being right next door to Epcot and to the Boardwalk. We have been fortunate enough to get a 5th floor Epcot view on both of our previous visits with a spectacular view of Spaceship Earth; we can also see Illuminations fireworks.
We like the Beach Club resort itself. Though we've never actually stayed there we almost certainly would have had we not bought DVC. We like the lobby and enjoy eating at both Cape May and Beaches & Cream.
I have to admit I'm a little envious of the short walk from BWV to MGM. It's still a reasonable walk from BCV but significantly longer. The SAB pool complex more than makes up for this. We've had a great time there and haven't even done the slide yet.
Parking at BCV is ideal. Self-parking is right next to the resort! We usually parking within 100 feet or less of an entrance. Transportation may not be ideal, but with a rental car it doesn't matter. BCV is centrally located on property, so AK, MK, and DTD are each literally just a few minutes drive away. Of course you can't actually drive to MK but the entrance to MK parking really is just a 5-minute drive.
One hears various complaints about traffic noise, bathroom doors, AC, etc., but none of them has ever been the least concern to us. And we bought when it was NEW! Like buying a new car.