I have the shortest fic-memory EVER (I really should update my ficrecs site as often as I do my vidrecs site, but I just don't). Still, here are my Psych memories. The SPN crossover in particular is ace. Yuletide has some good stuff too; if you haven't read "Gus for the Gold Star" already you absolutely should.

As for angst, I've mostly been browsing the h/c category on psychfic.com and forgotten each fic as soon as I've read it, but I vaguely remember liking this one. And because I'm a total hypocrite, here's a very good Shawn death fic. (Or more accurately, ghost fic.)