I did for a little bit. At first I found him to be funny and refreshing, but after a while his consistent crassness kind of turned me off. That said, I definitely understand his appeal and I'm really glad he's able to reach out to and inspire so many people, even if he and I have different philosophical approaches to nature. His passion is infectious.
He and you and everyone else is right about being outside being good for mental health. I mean, yeah, there's papers and studies that say so, but just go outside and pay attention to your mood and the proof is right there in front of you. That said, August has not been a good month for me getting outside, between work and the heat keeping me away. I can't believe I'm saying this, because summer used to be my favorite season, but I'm really looking forward to fall and winter hiking. Those seasons are a lot less taxing on the body.