When I was like, 8 or 9, I rented Parasite Eve. It was the first time I actually went through with playing a horror game, and I was really digging it. For some reason, only hours into the game, I let my friend convince me that the game was too scary, and that I couldn't play it anymore, so I returned it to the rental store.
To this day, I've still never picked it back up, and I've regretted it ever since.