Just realised this thread is nearly two years old, so forgive the necro but...
I'm glad this thread exists, it's pretty encouraging (the odd accusation of no imagination notwithstanding). One of the reasons I was so reticent to join up and post in days gone by is that my magnum opus, if you like, is "only" fan fiction. I've encountered a lot of flak in the past for not being "creative" enough to write my own "original" story. Hello, my characters and plots are entirely original, thank you, and are no less valid for existing in a universe that has captivated my imagination since childhood. You don't* insult a new writer on a TV series for "playing in someone else's sandbox". The only difference between my fiction and theirs is that theirs got made into a programme... well, that's the way I like to look at it.
So yeah, the general feeling I get from this thread is that us fan-ficcers are okay here, so I think I'll get started on that publishing biz. Sooooon...
*Okay, I have actually seen people do that.