I used to smoke a stupid amount in my late teens and early twenties.

It definitely had a detrimental effect during those years. I wasn't interested in either work or education and lived in a bubble. All I was interested in doing was getting stoned.

It would have affected my personality in that I wasn't inclined to mix with people in other groups who were not like minded. In small town Ireland in the mid 90s, a lot of people were not cool with weed, so I just stuck to my own group. I'm pretty sure that held my social development back a few years.

In the last years before I gave up, paranoia and social anxiety became an issue.

I didn't smoke for around a decade after stopping. In recent years, I 'll smoke a bit of weed that I know the source of. No more of that shit hash which was all you could get hold of in the 90s.

Like anything, it's definitely not harmless if used to excess.

It should be legal though.