I just got back from the Valley last night. I would move here in and instant if I could afford it.
Coming from Canada (Waterloo region), where the winter is unbearably cold and the summers unbearably hot, I could get used to the cool and consistent climate.
As and outdoorsy person, I can't think of a better place than the valley area to live in and have such an abundance of things to do in nature. You're also pretty close to nevada and colorado, both of which are also beautiful.
As a technologist and entrepreneur, it's pretty obvious that the valley is the place to be, what with the greatest density of talent and tech/high-risk financing in the world.