This and anything by this author.  Also, this author.  I'm sure there's more, but I can't really think of much at the moment.

http://www.fanfiction.net/s/3486089/1/TheManWithNoName

The Doctor is completely IC for once, the story has that NuWho feel despite taking place in Firefly, there are some nice Continuity Nods, and the Firefly canons and locations fit according to PPCers who watch the show.

http://www.fanfiction.net/s/2048837/1/Reminiscence

Calvin and Hobbes.

http://destron.blogspot.com/2007/10/introduction.html

This Warcraft fic, about a Forsaken traveler on a journey throughout Azeroth and Outland, is one of the reasons that I love the fandom.

PS: I wasn't there, since I lost internet acsess for several days. Is it over?

Elves, Hobbits, & Mary-Sues, Oh My Rather liked this one, despite it being a Mary Sue Girl-falls-into-ME Legomance. Also proves even more that, as Trojie and Pads stated, there is no such thing as a bad genre. Bast herself liked the fic, as shown in her reviews and her old FFN account's favorites list. I found it through there, and was not disappointed.

There's a most likely not dead sequel here. Seems the author is determined to prove that almost every single one of the PPC's most kill-worthy offenses can be written well, as this is a HP/LoTR crossover that doesn't have my blood boiling. I'm beginning to wonder if she'll try turning the Prophesied Hero OC or Woeful Angsty Past plot points into something readable next.

...Which is saying something, since it's not really a fandom of mine. XD

Wedding Night by PlayerPiano
It's Victor and Victoria's first night as a married couple...And they're both nervous enough to faint. Completed.

http://www.fanfiction.net/s/2623751/1/Wedding_Night

http://tvtropes.org/pmwiki/pmwiki.php/Main/FanFicRecommendations

Got goodfic requests, add them to the list for all (who browse TvTropes) to find! And you can find other recommendations there as well if you're searching.

Apple and Kiwi. Some of the best stuff I've ever read. Here's a link to their bio page: http://www.fanfiction.net/u/789781/

Not sure if this classifies as fanfic but it is good. Hstaphath's Monty Python and the Lord of the Rings and Monty Python and the Hobbit. XenoCorp's websit is here: http://www.xenocorp.net/H_bardCorner/xcbard.htm

~Zoe~

But will only post my favorites.

Doctor Who
Belonging: http://never-more-fics.livejournal.com/2428.html
One of my favorites, great plot, great sex, great drama, great...everything.
Rude & Ginger: The Movie, by nostalgia
http://www.whofic.com/viewstory.php?sid=29677
"Donna meets the wrong Doctor. Or is it the *right* Doctor, boom-chikka?"
Fantastic Four, by Tungsten Monk
http://www.whofic.com/viewstory.php?sid=11289
"Rose has met her universe's Doctor, and she loves his scarf. His wife's not bad either. Together on the edge of space (once every Friday, anyway) they've formed their own little cozy brand of domestic. But when her Doctor comes looking for her, the one she knows now has got a few things to say to him."
Harry Potter
A Little More Time, By Jess Pallas
http://www.fanfiction.net/s/3688609/1/ALittleMoreTime
"DH Spoilers Was it possible to save two lives without altering history? Was it possible to given them a future twenty years after they had supposedly died? Teddy Lupin thought so..."
LOVE-a DH AU done right.
When Are We?, by Ramzes
<a href="http://www.fanfiction.net/s/4071526/1/WhenAreWe">http://www.fanfiction.net/s/4071526/1/WhenAreWe
"Don't touch it!" Teddy shouted, but since when had James started obeying commands? He turned the hourglass and the world around them started spinning... and spinning... and spinning."
Teddy Lupin and The Untouchables, by Wildfungusgrows
<a href="http://www.fanfiction.net/s/3716810/1/TeddyLupinandTheUntouchables">http://www.fanfiction.net/s/3716810/1/TeddyLupinandThe_Untouchables
"Teddy Lupin is one of three famous orphans to have graced the halls of Hogwarts. He thinks he knows what he wants in life. But will he go the way of Tom Riddle or Harry Potter? Post DH, TL & VW, first ever fanfic! please read"
It really is better then it looks- a different take on Teddy then most fanfics.

http://www.fanfiction.net/s/1965410/1/VengeanceQuest
Insanely gory, creepy, mindscrewy fun. With cute little fluffy animals. Who die in horrible ways. What's not to love?

Also "Mary Mordor Sue": <a href="http://www.fanfiction.net/s/953329/1/MaryMordorSue">http://www.fanfiction.net/s/953329/1/MaryMordorSue
Even more insanely gory, creepy, and mindscrewy. I've been tossing around the idea for a Redwall fic loosely based on this for ages but never got round to it.

Any fics written by these people are good:
<a href="http://www.fanfiction.net/u/237238/HJBender">http://www.fanfiction.net/u/237238/HJ_Bender
http://www.fanfiction.net/u/331210/samvimes
http://dreya-uberwald.livejournal.com/

I recommend anything (particularly Redwall) written by QuinlanOfRedwall: http://www.fanfiction.net/u/614754/QuinlanofRedwall

Seriously, his stories are incredibly well thought-out. If I didn't know better, I'd think it was BJ himself writing that stuff.

Most NSFW, but all *wonderfully* written.

http://franticsga.livejournal.com/20240.html#cutid1
- brilliant Merlin AU, set in Iraq - eventual Merlin/Arthur slash.

and also, a fic that proves, really well, that there's no such thing as a bad genre - Merlin Real Person Slash Mpreg (yes, you read that right). It's hilarious. - http://ifyouweremine.livejournal.com/139767.html#cutid1

Some new Star Trek fic:

http://ladyrogueevie.livejournal.com/66897.html - Kirk/Spock, asphyxiation kink.

http://raphaela667.livejournal.com/37366.html - Kirk/Spock, Sulu the king of gossip overhears something ...

http://mithrigil.livejournal.com/441538.html - Kirk/Spock, clinical porn.

http://irisbleufic.livejournal.com/147832.html - not much pairing but much hilarity; the Enterprise crew find some Nintendo gear to play with.

Narnia:

http://ineptshieldmaid.livejournal.com/110194.html - Susan/Caspian, angsty, gorgeous writing.

Doctor Who:

http://community.livejournal.com/shaggydogstales/3672.html - the Doctor repeatedly trying to propose to the Master and the Master repeatedly committing suicide rather than accept, also hilarious.

http://googlebrat.livejournal.com/505772.html - Jack Harkness and the end of the universe ...