Input Junkie

For UF, anything by Charles De Lint, of course (I suggest one of the earlier collections of Newford stories as a good starting point) (because these define the genre), or the October Daye novels by Seanan McGuire (there are now two, with the third due late 2010 or 2011; I forget, exactly) (these are mysteries, as well; they excel at characterization and at providing the feel of a world simultaneously inhabited by and coeval with Faerie).