We normally stay at the BWV, but since the Inn and Villas share alot of the same services I will respond.
The main attraction of the BWV and BWI is, of course, the Boardwalk. Things don't really get started until dark and continue to pick up until about 11:00 PM. Don't miss the entertainers on the Boardwalk!
The dinning experience is great. Lots of choices. Don't forget that the YC/BC/Swan/Dolphin are about a 5 minute walk away.
There are surrey bikes to rent that you can ride along the Boardwalk also.
If you are into swimming, Luna Park is a pretty neat pool.
Of course the best thing about any of the EPCOT resorts is the ability to walk to both EPCOT and MGM, which opens up all kinds of options!
Have fun!!!!!