Not so much, really. SPN fandom terrifies me beyond all belief. I occasionally scribble things for it, eye it warily, and then back away. From what I have seen, it looks like the A/B/O trope exploded all over it, and since I can't stand it... Eh.
There's Deleted Scenes (http://archiveofourown.org/series/10109) which is an impressively huge undertaking, charting Wincest through Seasons1-5 (currently up to 5x5)
Kindness of a Stranger (http://archiveofourown.org/works/549304), which is an AR after the Season 1 episode Shadow with human!Cas/Dean. Sadly, the premise isn't that hard to believe, either.
Crush (http://archiveofourown.org/works/826173/chapters/1568741) - domestic!Wincest through the eyes of an outsider who develops a crush on both of them.
How (thanks to Gabriel) Dean and Castial (accidentally) raised each other (and Sam) (http://archiveofourown.org/works/540915/chapters/961503) is what it says on the tin. Gabriel messes with the timeline; everything changes. There's some pretty cure kid! scenes as well and both boys are more balanced than in canon.
I'm...venturing in for Season 9 Gabriel. That's it. That's my only reason. I'm rewatching Season 4 at the moment, though ^.^ And I agree wholeheartedly that they should have stopped and let it end after Season 5, but...but...Gabriel. Agh! I want him to live.
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There's Deleted Scenes (http://archiveofourown.org/series/10109) which is an impressively huge undertaking, charting Wincest through Seasons1-5 (currently up to 5x5)
Kindness of a Stranger (http://archiveofourown.org/works/549304), which is an AR after the Season 1 episode Shadow with human!Cas/Dean. Sadly, the premise isn't that hard to believe, either.
Crush (http://archiveofourown.org/works/826173/chapters/1568741) - domestic!Wincest through the eyes of an outsider who develops a crush on both of them.
How (thanks to Gabriel) Dean and Castial (accidentally) raised each other (and Sam) (http://archiveofourown.org/works/540915/chapters/961503) is what it says on the tin. Gabriel messes with the timeline; everything changes. There's some pretty cure kid! scenes as well and both boys are more balanced than in canon.
I'm...venturing in for Season 9 Gabriel. That's it. That's my only reason. I'm rewatching Season 4 at the moment, though ^.^
And I agree wholeheartedly that they should have stopped and let it end after Season 5, but...but...Gabriel. Agh! I want him to live.