Neither?

Okay, but since this challenge specifically asks which one between the two, let me answer: I'd rather be the werewolf.

I don't know much about werewolves or vampires. But, here we go, trying to distinguish the advantage(s) and disadvantage(s) of my choice:

PROS

I don't have to quench myself on the living substance of another (A.K.A. Blood)

CONS

I'LL BE A BLOODY WEREWOLF!!! That's a con in and of itself... (Wait...that could also be a pro in and of itself...I'll have to think that through with myself...)

HIGHLIGHT OF MY LIFE:

When not in my transformation, I could actually really live a normal life!

LOWLIGHT OF MY LIFE:

When in my werewolf form...Well, I don't know. Maybe people will try to kill me?

That's it. The lowlight of my life: Having to hide and stay alive.

* * * * *

What on earth is this junk?! Hold on. I could pick another supernatural creature if I'd rather?! Why didn't I just do that...

Could I be a dragon? That sounds like fun...