Wow, BSPECIALT, I wish I could answer ALL of your questions, but I was only there for two day so, no I didn't take advantage of the MANY recreations Westgate offers. We were there for the 30th and 31st of December. Both days we spent at the parks mostly. I did take the infamous tour, quite painless, I must add, and got a birdseye view of most of what the resort offers.
I did stay NEAR the Westgate Villas, in fact my vacation home was right down the way from them. They looked almost identical from the outside but I've never stayed there. I think the biggest difference is the location. The Villas are much closer to the Disney parks, while the Lakes are much closer to Seaworld and Universal.
I stayed in a studio, which was fine for me and my son. It would probably be rather tight if there were more people, especially with the jacuzzi (my FAVORITE part) out in clear sight! I took a tour of the two bedroom which was awesome! Lots of space!
Hope that helps!