Fic Recs

There has been some discussion amongst my flist about our collective fic recs and I was hoping we could all share the wealth with each other.   Would love to see comments from folks that tell some of their faves, and I will put no limits on the fandom or the pairings.  I just want to know what grabbed everyone the first time they read it and they thought - I just have to tell someone about this great story.

So here are the rules:

1. Any fandom you enjoy
2. Any pairing - my motto is that great writing is great writing no matter who your OTP might be
3. WIPs are perfectly acceptable but no ON HIATUS please

So basically, NO RULES! 

I will make my list and post it in a few days, but I want to hear from everyone first!