Heh, I live in Holland, so you can get genetically modified super-weed anywhere.
I was on it for years until I decided I'd had enough.
I wasn't smoking because it got me stoned anymore, but just because it was a habit.
Took me months to get off it, but when I did I felt healthier, more energetic and I didn't have this haze shrouding my thought-process all the time.
My advice is; if you light up, light a big one on rare occasions.
It will really hit you instead of making you all fuzzy all the time so you waste loads of time sitting around puffing away to no effect and getting disinterested in learning new things...