I used to only get slightly stoned when I smoked. I didn't have many creative insights or anything but I felt more relazed and music sounded good. But then one day I was at my friends house and we just went on a weed binge. No it's like a door has been opened up and everytime I smoke I get these incredible creative insights. Try smoking just a little and see if you get more stoned than you used to when you smoked a lot.