Fanfiction is one thing, the characters are already created and, unless you're placing the characters in a completely AU universe, so is much of the storyline. Plus there's the fact that almost all of my fanfiction is humour. It's supposed to be funny, it's supposed to make people laugh, it's not supposed to be a serious well written piece of drama or believable romance.
I'm trying to be positive, trying not to resign myself to failure before I even start but it's difficult. I've found that it's always best to expect the worst so you can only be pleasantly surprised rather than getting your hopes up and being disappointed.