As someone who writes both original fiction and fanfic, and published a fiction fanzine for about 14 years, I've read or seen just about every permutation of fanfic in existence -- and ah, the tales I could tell, the horrors I have seen, and the occasional delights. But that's a long, long story.
For myself, I don't care much for angst or H/C or Mary Sue or whatever fics (just give me a plain old good story), but there is one Mary Sue LotR parody that makes me laugh so hard, it hurts. It's called "Nine Men and a Little Lady" by one Kielle, and I believe it can be found here:
http://www.subreality.com/marysue/nmaall.htm Personally, I find Galadriel's entry the most hilarious, but I have a rather odd sense of humor.
