I am one of the people that said I do not "love" the BWV atmosphere. And, saying why I don't is really hard...it's difficult to put my finger on it. It has less to do with the Boardwalk itself, and more to do with the ambience of the whole resort.
From the moment you pull up to the porte cochere....you know you are at a REALLY big resort. We have never found the valet to be not congested (okay, it was dead at 3:30 AM when we had to take our dd to the hospital). But, other than that, we have always found no less than 20 cars waiting in the valet area...it's crazy there!! They have a LOT of bellhops, and they are a busy brood!!!
Also, because all the amenities are outside the hotel, the lobby itself is fairly small, so there seems to be a great deal of congestion in the lobby. Personally, I don't think the "Screen Porch" is big enough for a resort that size, and so shopping in that store always makes me a little

.
I also do not find ESPN to be very "Disney-ish". It can get very loud in the evenings, and I did not like walking past the somewhat intoxicated "20 somethings" to get to the hotel.
I also found that, because the pool is tucked away in the back of the resort, it felt like more of an "afterthought". When we would return every evening, we felt like "Busy...busy...busy....oh, look over there...there's a really great pool." It is a beautiful pool....but, it doesn't help to set the mood of the resort, as you have to go thru the resort to get there. In contrast, SAB is on the lake side of the pool, and the entire YC/BC "curves" around the pool complex. So, when we come back from Epcot, we always take the "leisurely" stroll thru the pool area to get to the lobby. And, when you are swimming at BCV, you get the wonderful views of Crescent lake, and the BWV across the way. At night, you can walk barefoot along the beach and relax in the lounge chairs.
There is something about the 'busy-ness" of BWV that adds to my "go-go-go" attitude at WDW....it like, when we stay at BWV, we never truly relax....it's too big, too crowded, too busy. But, there is something about BCV that gently coaxes, "Relax...take your shoes off...you have plenty of time..." Whenever I walk thru SAB to get to my room, I feel like I have just been "hugged". I'll be the first to say, I have a WEIRD affection for that resort....

, but somehow that place speaks to my soul!!!
There is nothing wrong with BWV...it is a BEAUTIFUL resort with a lot of great features going for it....I just find it difficult to relax there. My dh explained it best. He said, "Although I think the Boardwalk entertainment area is a nice place to go, it's not an area I want attached to my resort."
Beca