RPF
RPF fandoms are all linked to from this page so people who have problems with it can avoid it and vice versa.
Jump around : LotR RPF
It was my big guilty pleasure but now I rarely read it.
Fantasy by Cimorene
Utterly gorgeous Dom/Billy. Also, hot.
Delirium series by Cimorene
Half Mad / Taste of Want / Fever
Subtle, slow burn DomLijah.
In White by Wax Jism
Orlijah corset fic. Hot.
Half Open Door by Dale
Total kink fic, but hot.
Maya by V
Beautiful, lyrical and just generally cool.
Sabotage and Subversion by Calico 
Hot! Hot! Hot! Sexiest PWPs ever.