For reading, my favourites are dark-ish gen AUs or casefics, especially postapocalyptic. I like shipping, but within the story frame, not a romance story by itself. I'm okay with MSR or M/K (with varying combinations thereof). For discussion I'd rather have gen of varying kinds, but I still lean toward the dark. One fic I like for reading and/or discussing is Oklahoma (http://www.annex-files.com/annex/annex/covers/oklahoma.html), by Amperage and Livengoo. I usually don't like Muldertorture, but this is a really good read. Definitely not for depressed people, though, one should be in a good mood to read it.