I smoked weed from the age of 14 to 24; also dropped LSD about 100 times between 14 and 19 years of age.
I'm in my late 40's now and totally normal. I think I smoked weed like 3 times in the last 20 years and it is not my thing anymore.
Smoking weed was definitely more fun in my youth. Did it affect my brain development? maybe