*As far as other pairings... the only ones I've seen are Sam or Dean with John (which, for me, is just completely NO)*

The idea of John/Dean (with Dean as an adult) intrigues me, but I have yet to read a story (among the few that I've found) that made it palatable. I mostly stick to the gen, the few Dean/OMC, Dean/OFC and John/Mary stories out there, and the Sam/Dean stories I find via recs.

I'm keeping my fingers crossed that I'll continue to find ones I enjoy like yours. :-)