Beach Club is my second-favorite resort overall, but its bus transportation is my least favorite. We tend to concentrate most of our time at Epcot, Hollywood Studios, and Storm-Along Bay when we're staying there. (We almost always do a split stay, so we'll typically save the other parks for when we're at the other resort.)
Fortunately, the parking lot is very convenient for the villas at Beach Club, so we ensure we have a rental car when staying here.
The only park that gives me pause is Magic Kingdom. At any other
DVC property, we'll always take Disney transportation to Magic Kingdom, even if we have a rental car. I absolutely hate dealing with the Magic Kingdom parking lot, the trams, and getting from the Ticket & Transportation Center to the entrance -- especially if we're arriving at opening or leaving at closing. I don't mind driving to and parking at any other park.
At BCV, I have the dilema if we do decide to go to MK, because I don't know which is the lesser of the two evils: the Swan -> Dolphin -> Boardwalk -> Beach Club bus route, or the Magic Kingdom parking lot. We must have never hit it at the right time of year, because every time I've been on that bus, we've stopped at all four resorts.