Hm.... I have lots of things that could be considered the worst for me. .___.; I'll name a few, nya.
I think the first was waaaay back, when I was around 3 years old, nya. This scarred me so much, it's one of the only things I remember from back then. XD You see, my parents though I was just being childish when I wouldn't sleep without some form of light on. But they just didn't KNOW! X.x When I was alone, wierd things happened, nya. Things fell out of my closest, I heard scratching and pounding noises, but it all stopped when they would come in, nya. I believe this ended after I heard someone in the bathroom, and no one was there. But I still can't sleep in the dark unless I'm with someone, nya. XD
My next was probably in Preschool. Everyone hated me, they made fun of me for being boyish and liking bugs. >.<; And the teachers didn't like me much either, they made me sit alone and not interact with anyone else, nya. And the older kids there chased me. x.x That is what started my unsocial nature, and memories from that place haunt me. X_x But it did do some good, now teasing doesn't hurt me at all, and I have much more patience and understanding with disabled and outcast people, nya. ^^;