Uhh... doesn't that kind of make them want them more? I dont know if writing is like TV, but if it is then anyone who wants money and fame should be writing about vampires. All it takes is one TV show about garbage men to become a hit and suddenly every idiot writer and his idiot writing dog will be firing garbage man scripts at producers... I dont know if its like this (god i hope not) but i do know the last time i was in a big fancy bookstore i sure remember seeing a lot of vampire novels...
To the OP. I think if you're a good writer, the only way it could be cheesy is if you just rip something off. I dont care how good your prose is, if i read it and immediately think; Hmmm... girl with low self-esteem, effeminate vampire boy, angry werewolf boy, love triangle... are you even trying...???, or if i think; 'Hey, Gary Oldman just called, and he wants his character back...' well then, newsflash: its cheesy. Be original, or put an original spin on something.