Well if shameless self pimps are okay :) then I can point you to two that I wrote.

The Road to Detroit is Paved With Hell is a post Abandon All Hope S5 fic. It's AU from that point on and is very much about Dean (Sam, too.) It's about 55K in length.
http://sandymg.livejournal.com/14620.html

Golem is preStanford casefic that's Dean-centric.
It's a little shorter at 26k words
http://sandymg.livejournal.com/16088.html

Hope you like them.

This by leonidasden are AMAZING you must read them^^

http://community.livejournal.com/leonidasden/72751.html

http://community.livejournal.com/leonidasden/34359.html

They are wincest storys but hurt/comfort too and loooong very long mainly centered on Dean´s reactions.You should read anything by her^^

http://delicious.com/Marlowe97
Pretty much all of mine are Dean-centric. If not, they are tagged as such
the "dean" tag is there, but I actually don't use it, since I already said, there are not many that have NOT Dean in them.
My favourites are tagged "must read" and you should check them out.


I would have copied them here, but I'm not at home right now and have only limited time, so I hope my delicious is all right with you.

(ok, I'll put two of the bestest here:
http://pdragon76.livejournal.com/34039.html "Blind Spot" (Dean's on a slow burn after a bloody confrontation with an old nemesis. Sam's got his hands full picking up the pieces. The Crossroads Deal isn't the only timer ticking. )

http://www.fanfiction.net/s/5231870/1/The_Killing_Moon "The Killing Moon" (Sequel, should read the first first, but this one is better) (A promise to a friend takes Dean Winchester back to the woods of Hibbing in a hunt that brings him face to face with his worst nightmare…)

http://innocentculprit.livejournal.com/4212.html#cutid1 "And deposit your trash..." (Between the Winchesters and the Apocalypse lies engine trouble and a bad breakdown in communication. Oh, and ghosts. Nasty ones.
Very angsty, with a GREAT plot and nasty ghosts. Fantastic style. )

http://www.fanfiction.net/s/3169840/1/Red "Red" (Something evil is killing treeplanters in the forests of the Pacific Northwest, possibly the same predator that Dean narrowly escaped years before. How Grimm will things get before the brothers figure it out? (world best fanfiction ever written. Nothing better yet) )

http://dodger-winslow.livejournal.com/78200.html#cutid1 "Stay" (Outside OPV - When breakfast on the road takes a deadly turn, Dean is the only one who can save his father's life. He's ten, he's alone, and the only way he makes it is if she stays. )

thanks ya'll keep 'em coming!

I've got about 600 recs up over at my Delicious account (http://delicious.com/kenzimone/Supernatural). Almost all are Dean centric, and about half are tagged with word count. Check out the MustRead tag (http://delicious.com/kenzimone/Supernatural+MustRead) for my absolute favorites.