I grew up on the extreme west coast of Canada, where it is not unheard of to share a joint with your friend's parents when visiting their house, so I have been exposed to a lot of pot smokers and used to smoke fairly frequently myself. I don't know if this is just me, or also linked to the strength of the weed out there but most of the time, it was a negative experience. Just made me paranoid and dull - a lot less talkative than when not stoned. Then it made me robo-eat for an hour. It affects my INFP sister very differently - makes her busy and active. I don't think I could go for a walk while stoned if you held a gun to my head.
When it worked out it was great. Definitely increased s-ness. Conscious of things like the feeling of the wind on your face, how delicious plain saltine crackers are etc.
I don't smoke much anymore but when I do I specifically request the weak stuff!