I read a goodly number of short stories. Lovecraft is one of my favorite authors, and he of course was pretty much exclusively a short ficition writer.
Also, horror is one of my favorite genres, and a lot of the best horror ficition is in the short form.
Ray Bradbury is another big favorite of mine, and also primarily a short story author. Several of his "novels" are actually short story collections, and even the ones that arent are extremely short novels (Farenheit 451 and Something Wicked This Way Comes for instance).
Lately I've been having trouble commiting to getting started on anything long, especially by a previously unknown author, so my short story ratio is probably up even higher.