I must have saw aliens when I was about 6 as well as all the other movies that came out around then.
never had a problem with TV or movies.
I was scared of the dark a bit though... find it more disturbing listening to creepy real life horror stories on like the channel of "Lazy Masquerade" on youtube.
some of them really freak me out if I'm alone late at night.
probably even better if youre sitting in a park or somewhere late at night listening with headphones
Aliens was the first 18 rated movie I watched, I think I was about the same age you were actually. I saw that it was going to be on when reading the TV guide and set my VHS to record it for me as I had one in my bedroom. Watched it the next morning and thought it was the best thing ever. I remember getting a Xenomorph toy that exploded into bits when you pushed a button afterwards, started a life long love of the franchise.
Lazy Masquerade is a great creepypasta channel too!