I didn't get to play any games when I was a kid, apart from when I went to a friend's house and played theirs 
As for the future, I won't be having kids myself but I fully expect to look after nieces/nephews/godchildren at some point. In that case I'd run things past the parents first, but generally I'd let them play M rated games once they hit their teens. Like 14 or 15, but it would very much depend on the game and the kid. Different kids can cope with things differently, and I'd definitely have to have checked the game out myself before letting a kid play it.
Despite them not understanding games, that's the attitude my parents had with films when I was growing up and I think it's a good one. I saw plenty of 15 and 18 rated films way before I met the age requirements, but my parents always had a good idea what they were letting me watch, and some things remained off-limits, at least temporarily. It was a decent system, and I was hardly ever barred from seeing something I really wanted to see (I was never into really hardcore horror films or whatever). My parents were pretty good judges of my maturity.
Obviously once someone hits 16 and especially 17 it's ridiculous to police their entertainment in anything other than the most extreme circumstances though. I class most people that age as young adults rather than kids.
As for the future, I won't be having kids myself but I fully expect to look after nieces/nephews/godchildren at some point. In that case I'd run things past the parents first, but generally I'd let them play M rated games once they hit their teens. Like 14 or 15, but it would very much depend on the game and the kid. Different kids can cope with things differently, and I'd definitely have to have checked the game out myself before letting a kid play it.
Despite them not understanding games, that's the attitude my parents had with films when I was growing up and I think it's a good one. I saw plenty of 15 and 18 rated films way before I met the age requirements, but my parents always had a good idea what they were letting me watch, and some things remained off-limits, at least temporarily. It was a decent system, and I was hardly ever barred from seeing something I really wanted to see (I was never into really hardcore horror films or whatever). My parents were pretty good judges of my maturity.
Obviously once someone hits 16 and especially 17 it's ridiculous to police their entertainment in anything other than the most extreme circumstances though. I class most people that age as young adults rather than kids.