If you like Wincest at all, you've probably read justinedelarge's Sure Got a Dirty Mouth (http://archiveofourown.org/works/411362/chapters/682610), but just in case you haven't, it's wonderful and LONG and has some really great chapters where Sam realizes just how much Dean's given up for him.

This is a completely different take on Dean's self-sacrifice, and I'm not sure whether you'll like it, but it completely broke my heart - Indirect Proof (https://www.fanfiction.net/s/3938325/1/Indirect_Proof) by starliteyes17: "Dean's not just any brother." (Gen)