Me too. Huzzah for porn!
I made my feelings plain on fan fic in my View column. I don't like it, and question the reasons why people write it. I suspect that many people write it in the hope of becoming a Devin Grayson - making the transition from fan fic to writer. Grayson was the only person, however, to my knowledge who managed this transition. Fan fic writers need to realise that editors don't read fan fic. The fact I used to write it is my secret shame.
Writing fiction without established characters, however, is not fan fic - it is entirely acceptable and should be applauded.