No. Not at all, it doesn't interest me. I write and read mostly thriller, but always happy endings! I seriously am a sucker for them. I don't write sad endings. Lol. It's just not my style, and I actually stick with authors who I know will produce a satisfying, not necessarily perfect ending.
I have a hard time finding fiction I like. I am really picky and one mistake or syntax error or terribly over done description of a character or cliche and I put the book down. I don't think I could get through a paragraph of most fanfic.
I read and write it; the former for fun, the latter to give me a chance to fantasize, vent, or even just practice my writing skills. Granted, about 80% of my fics don't make it onto the internet, but it helps me get ideas out there and examine what sorts of themes and styles I am strong with and could potentially use for an original work.
I used to while married, but not anymore. I was damned good at it, too - I had been accused of being one of the writers of several shows with comments of "You're testing out the next season's material on us, aren't you??"
I hardly read it unless I know the writer personally - just like P'Gell, poor grammar, spelling, syntax, etc gives me migraines. I was directed to (what I'm told is) is a fabulous "Secretary" fanfic, but the fact that the author(s) used present-tense narration made me see red at the edges of my vision within the first run-on paragraph. No, just ... no. >_<
Both. I actually have an adultfanfiction.net account and I've written fanfictions mainly for Bakugan and My Candy Love. Plus I go on Fanfiction.net to read. When I'm bored. I'm writing right now actually...3 stories *facepalm* I never learn.