W/F -- that means Willow/Faith, right? Or Willow/Fred. Or Willow/Forrest. Or, it could be Wesley/Faith, Wesley/Fred, or Wesley/Forrest.
How many times have I sat down to read a really great Willow/Giles fic only to discover it's actually Wesley/Gunn? So, in light of my many disappointing discoveries, I've made up a list of characters, with abbreviations, that will hopefully, makethe pairings easier to understand.
Please remember, that when dealing with crossovers, readers who don't read a particular fandom won't understand abbreviations, so it is always good to write out the full names of all characters!
H- the Host/Lorne
Lo- Lorne/the Host
Ot- Other (non-BtVS/AtS character)
Rob- Robin Wood