Read my first Supernatural fic and picked a real winner, fortunately.
The Only People For Me Are The Mad Ones by ignipes Wonderfully angsty gen fic.
ETA: #2 also great!
This is the Way the World Ends by storydivagirl. (Whom I remember for writing terrific Jack/Sawyer but never any smut! ;-D). It's literally the end of the world and Sam and Dean are in a hotel room in Oklahoma, bickering about what they should do about it. Fantastic banter. Really enjoyed this one.
Also, I'm hoping there's a new chapter soon on this Lost AU from cmonkatiekatie. Jack is an FBI agent and Sawyer is a private detective and they're both in Ohio tracking Kate. The cat-and-mouse flirting between them is incredibly delicious. More please!
Hard-Boiled, Part 1, Part 2