Ok, here are a few writers out here I've found and loved so much
bree-black.livejournal.com/41545.html Of Storms and Sanctuary. (Dean/Castiel)
Beautifully written, it's a haunting and elegant encounter with a dream-walking Cas and a bed-ridden Dean.
This story has real staying power, I've read it a few times and it still holds the same command it did on first reading.
community.livejournal.com/arealwildchild/52119.html The Smoke and Lightning Trilogy. (Jared/Jensen)
Holy Cow Bat-fans! This is my absolute favourite J2 AU epic fic! Hot bikes, loads of ink and a perfect balance between angst, ass-kicking, love and violence. The wider 'verse and the fan-art it's inspired are truly staggering.
Set aside an entire weekend (or two) and just lose yourself in the world created by these two truly fantastic authors.
embroiderama.livejournal.com/55732.html Truth 'Verse. (Jeff/Jensen)
This collection of fics is one that I keep coming back to. It shows the full evolution of a relationship between the two in a way that no-other author I've found has been able to do. The angst of first coming out never tips over into the melodramatic and the eventual love really comes across and feels very real.
Gah! There are so many more but RL calls... more rec's coming soooooon :)