I wouldn't want to be a vampire for a number of reasons, first of all if I was the traditional Vampire I would have to live in a distant castle in the mountains alone and isolated and I'm really more of a people person. Second I wouldn't want to be an urban modern day Vampire because then I run the ever present risk of being killed in extreme prejudice by Wesley Snipes. Third I would not want to be a teenage Vampire because then I'll fall in love and get all angsty and whiny and the whole internet will hate me and I'll be used as a tool to pray on the hormonal instincts of teenage girls... and I would sparkle. Finally I would not want to be a fantasy Vampire with super powers because then I'll be forced to gloat about how holy and divine and immeasurably powerful I am to the mere mortals... only to then owned in the face by one of those mere mortals and die in extreme irony.
Okay seriously no, I hate the image of Vampires as these super attractive oversexed, sexed up, sexy, openly sexual, sexually open and generally horny creatures that exist as so many teenage fantasies... in my mind a Vampire is a vile hideous foul beast of the nether and therefore is not something I want to have anything to do with because an immortal being that feeds on the blood of the innocent is no higher than a parasite so an immortal powerful and eternal parasite is still lowlier than a shit stain on the side of the road if you ask me.
However even if I could consider it I've already decided I want to be a Sangheili, I'm even having the corrective surgery... soon my outside will reflect my inside.