In my case:

Halloween - saw when I was 8. It's actually kinda scary at that age.
Barbarella - has always been in with the other kids videos, as long as I can remember. Probably saw it when I was about 7.

Aliens. I had a brief phase when I was about seven of going to bed thinking "Don't think about Aliens. Don't think about Aliens". It was relatively traumatic or somesuch. As a wee nipper I sat through Lawrence of Arabia, Gandhi and other lengthy films and really enjoyed them. I'm less certain that I understood Educating Rita, although the book-burning scene stayed with me my whole life, until I watched it again.

__________________
Time is the distance that you can't return by miles.

I escaped somehow. Let's go

actualy [sic] I have quite a blessed life if I'm honest. I have many people to love, hate few and have few money problem's [sic].... What more does a person need? Oh yeah and I have some kind of humbleness unlike you of course ^_^ ~ CarefulCarpenter

Friday the 13th- 6 or 7
Face-Off- 5
Robocop- 5
Buffalo '66- 6
Pulp Fiction- 7

Two of these films became favorites.
Pulp Fiction was my favorite film till I was 14.

I was a right scaredy-cat with an overactive imagination so even fucking Goosebumps made me sleep with the light on when I was 11.

Anyway, the ones that made the biggest impact:

Watership Down - I was 5 or 6, and my mother thought it was about bunnies. Fair enough, it WAS, but they were ripping each others throats out and that field of blood part...ohhh

and Stephen King's IT when I was 11. It was on TV one evening and I dared myself to watch it because my stepdad was watching it. That was a mistake. At that time, I was sleeping on the lower level of the house, with my mum and stepdad upstairs, and the bathroom was all the way through the rec. room and i used to have to turn ALL the lights on

__________________

Pink Floyds The Wall messed me up for days when I was 7.