I smoked fairly heavily for over a decade. I stopped before going into the military, and didn't smoke again for about 10 years. When I finally started smoking again, I couldn't handle it like I once did. The way it effected me had completely changed. While it once actually gave me energy and motivation to do things, it now just lays my ass out. It still has the same mental effects (creativity, laughter, etc...), but my body just can't take it like it once did. I sometimes wonder if edibles might be something that would bring back the old sensation, but I have yet to try them.