Thank you for the 20+ Snarry Recs list - haven't read most of those yet, so yay!
A few fics that I wanted to mention that I find myself rereading (all are slash, most not too graphic):
Harry Potter
HP/SS
Blood by Artemis Luna Diana (unfinished)
The Mirror of Maybe by Midnight Blue (unfinished)
HP/DM
Gold-Tinted Spectacles by Baren
and my all time favorite, takes me days to read but is so very worth it:
Gundam Wing - HY/DM
The Ion Arc by Sunhawk
and pretty much everything else written by Sunhawk, actually....
Non-slash fics that are good:
Inuyasha
Kagome/Sesshoumaru
A Breeder's World by BlueRibbon98 (unfinished)
The Syndrome by SunsetMiko
Vying For Dominance by ShadowsWeaver1
I'll stop there, as I could type all day and not come close to finishing a list of all the really good fics I have read.
Sadly, there are far more fics that start on a great premise, but the writing style is unreadable. Continuous source of free reading material though, and there is literally something for everyone's tastes.