creatures that were screened

why must there always a relation between vampires and lycans??
why not kangaroo and panda instead?
or maybe penguin and dog or watever...


anyway a thought come to me,
which would i choose if i would to become:

a vampire that can fly but only can appear when there isn't sunlight and can only feed on blood;

or a lycan that can jump and climb with agile but couldn't even control when to eat.