I do like both the Werewolf and High School pack almost equally. With a world (werewolf) that has almost no loading screens, only when just entering into different lots, you can walk around the whole town with no loading screen. I do like the library and gym combo in the town.
With High School I really love how they added more to the teen life stage, now I only hope they do the same for elementary kids.
As far as the world that came with the high school pack, I can't really go into much detail, because I haven't really gotten a chance to delve into it much yet.