Solitude from 14 on. Ended up on the wrong side of the class politics in middle school, accidentally made an enemy of the vice principal's kid, who just happened to be a classmate of mine in almost every period. Transferred out, did school over the internet until college. As I'm only 20, my memory should be perfectly clear... but it isn't.
I remember bits and pieces of the conflict I had with other students. The last straw was when one of my class notebooks was stolen by an absolute trollop right before finals.
It actually affected me more than I like to admit. Made me almost unwilling to form emotional attachments to other people, and I absolutely hate being touched unprovoked, save something like a playful punch. Outside that, the only living thing that dares make sudden physical contact with me is my cat.
Had some minor parental issues as well, and I remember I would spend hours thinking of ways to get out of this place, what became a twisted mockery of home.
I am glad things have gotten better for me, although the effects linger.