Some specific "resort" offerings:
Kidani village has presentations at 8:15 each evening by the exchange folks from Africa. VERY interesting and fun to do.
Drum circle at Kidani library at 7:00 PM. LOTS of fun for both kids and adults.
View all the artifacts in the various resorts. i.e. American Indian items and Grand Canyon items at WL, African items at AKL both Jambo and Kidani. Kidani has them throughout all the hallways to the guest rooms. Grand Floridian jazz combo in the atrium and the piano player before and after the jazz combo. Wednesday morning "parade" of housekeepers at OKW. It's fun and funny to watch them drive into the resort on their carts from the path that goes to SSR/DTD. They even do it up with music and costumes! It usually happens around 8:00 am.
If you are there during holiday season, many of the resorts have special concerts and holiday offerings. Many are at WL. You can also tour all the gingerbread houses at the various resorts. We always like the carousel at BC/YC best.