Neon Showman (http://atimi.livejournal.com/10597.html) It's J2 from Chad's POV and I don't know what your opinion of Chad really is, but dude. Dude. I nearly busted a couple of veins from trying not to laugh too hard. Chad is hilarious in this!

Emo (http://boonies.livejournal.com/180907.html) Implied wincest, with Sam and Dean being stuck with a five-year-old orphan. It's really, really, really funny and extremely adorable.

Anti-Kink Series (http://www.livejournal.com/tools/memories.bml?user=ash_carpenter&keyword=Anti-kink&filter=all) A series of wincest fics featuring Sam and Dean and their failed attemps to introduce some kinks in their sex-life. The voyeurism and car!sex ones are the funniest things I've ever read!

Cutting Humor (http://www.fanfiction.net/s/2912515/1/bCutting_b_bHumor_b) Gen with Sam and Dean trying to take care of each other two separate times when the other is injured. Very funny and the second chapter is pure brilliance!