Personally, I've never done it and have no interest in it and I don't particularly mind anyone using recreationally as long as it doesn't affect me.
However, my 28-year-old son used to be a recreational smoker in high school and then ramped it up massively and has been a dealer so he could afford the massive amounts he smokes and earn money. He refused to go out and get a job to support his three young children (7 & 3-year-old twins) so he would put himself in harms way to sell pot for a bigger dealer. Of course, he also has a mental health issue and this massive pot use has affected his behavior and frankly he's been a terrible son and most definitely a horrible father.
I live in the US and in a state where marijuana is not legal. Last July, the children's mother upgraded from marijuana to heroin and had a mental episode and her mother got the police and child protective services involved and was put into jail. My son didn't live with her but he avoided collecting his children from such a horrible environment because he knew he had ANOTHER warrant for his arrest for drugs offenses. He arrived and was promptly carted off to jail. The children were put into my care.
All my son has to do to get his children returned is to get a proper job, to have a clean roof over his head and for his children, meet with his probation officer and attend classes but most importantly, be clean.
He's got a really good girlfriend who is a recreational user but hasn't touched the stuff because she wants the children to return, my son got a job, they have an apartment but guess what part he hasn't stopped. He refuses to stop smoking pot. He spends all his free time looking up ways how he can fool the random drug testing because he simply cannot fathom why he can't even have a little bit and has actually joined groups to fight the state and have the law overturned.
This Wednesday, we have a court case with child protective services and his parole officer in front of a judge. When the children were placed in my care, I was informed that it was for a minimum of three months to no more than six. I have had them for nine months. CPS and his parole officer have given him more time because they really don't want his children suffering but he has come to the end of his time (nearly three months ago) to stop his pot smoking and fulfill his other requirements. He has to provide another urine and hair follicle sample which he will show he has not stopped smoking pot. It will all be presented to a judge but really, it's essentially a judge stripping my son of his parental rights (the mother is still in jail) and the children will be placed into foster care and will be adopted.
I am losing my grandchildren because my son loves pot and everything about it that this nightmare of the past 10 years ends like this.
So yes, I think it's a pretty shitty drug.