Slate posts the favorite working fonts of a handful of writers. (A follow-up to a photoessay on Helvetica: "the font of the 20th Century.")
In case you're interested, I used Geneva most of the way through college for papers for class, and Courier, starting about the time of my playwriting class, for most of my creative work. I switched to Times in 2002 or so, since it seemed less pretentious. There is a part of me that misses Courier, though, and if I return to more intensive work in scripts and screenplays, I may pick it up again since script formatting demands it.
I am a bit embarrassed to say that I can't name any of the fonts we've used in Revelator's chapbooks. Brandon Kelley, our designer, has done such a good job that I've been almost entirely hands-off, but normally I'm kind of wonky about that sort of thing.