i used to smoke daily and when i took a months break and smoked again i got maaad high.. i also stopped smoking for 2 years about 4 years ago, and when i started smoking again i got mad high, now i smoke rarely and if its strong weed i can get really high of a few tokes, hash i can smoke quite a lot and still be functional (which is why i prefer some nice mellow afgan hash), but when i smoke ganja i can't concentrate or work or read anything serious for a good few hours, which is fine if i'm just hangin with friends, but i can't smoke a weed spliff before work in the morning and go about my day as if nothing had affected me ...
Yeah, that is why I would only smoke after work. I can't do serious work or anything while high. Its basically just time to chill either by myself or with friends, watch tv and maybe have a beer or two. I can really only puff indica dominant strains nowadays anyways.
I also prefer hash over weed. It is a bit harder to get hash in the US, but it can still be found relatively easily.