I accrue 7 weeks per year. Between, two weeks in Wyoming for fishing/backpacking, 2 weeks in Colorado for hunting, and 1 week in Europe with the wife, I can go through my PTO pretty quickly.
When I was younger, I would rarely take extended PTO. Now, I try to take it all. My company is great about letting me go out into the wilderness and be completely out of communication for a week. Every once in a while I have to get to a mountain top and find cell coverage to talk to someone. But, it's pretty rare.