werewolves and vampires are as old as time...the myth's and legends go back to ancient times
you're only sick of it because ever since twilight everyone is trying to cash in...
A slight correction (and by slight, I mean significant):
Legends about vampire-esque creatures have been around for a long time. The modern notion of vampires as we know it today didn't enter the popular consciousness of the West until Bram Stoker's "Dracula" became popular.
Likewise, legends and folklore about lycanthropy go back a long ways, but they are wildly different from the modern version. Werewolves as we understand them (infected from bites, anthropomorphic appearance, weakness to silver) didn't exist until the early 1900s.