This is how see it
Weed, for me is a culture/meditation thing. Its my own choice to toke or not to toke. But there are limits. I dont toke in front of kids, cops or people who are not cool with it. Its a respect thing, I always ask a non smoker if its cool if I toke, and if they have questions, I answer them as straightforward as I can. Of course, the more I toke, the more funny things I blur out. I will NEVER force someone to smoke weed if they dont want to.
When I toke alone, its to relax, concentrate and meditate. It spends time and I get a lot of thinking out of it. Or I use it as a challenge. When I go DH biking, it ups the difficulty. Same goes with running or any other extreme sport that does not require technique oriented thinking (climbing). Most people I hang out with dont smoke weed, but they are ok to the idea of me getting high. They know how it changes me and some take pleasure listening to me. Some on the other hand have no idea when Im high.
Thats my 2 cents