Is it my imagination, or does it look like most urban fantasy novels have to deal with vampires?
I'm not saying that's necessarily the case, but it's the first impression I'm getting.
Depends on what you mean, do you mean that vampires are the main focus of the series, or that vampires appear in the universe and in some of the stories? Dresden Files for instance has 3 different flavours of vampire and
but for the most part that's just background detail. And as far as I know none of the ones I mentioned have vampires as their main focus either.