The Summoning Fire is horror/urban fantasy (which isn't an uncommon mix).
Nasty, Brutish & Short Short, though, has some stories that mix-and-match:
"Down Hill" - Old West/Zombie apoc
"Crowfeeder" - traditional fantasy/military/horror
I've also written stories that could be called "assassin/urban fantasy" (is "assassin" a genre?) and a novel yet to be released that is YA/magical realism.
I have a hard time writing anything "straight". I'm always going to bend it somehow. Maybe even break it.
-David