I think it would be cool, though only if I can be a hybird without the weakness to sunlight.
You can be any sort of vampire. Eg. Daywalker, sparkly, etc.
Enhanced reflexes, irresistable to women, immortality, it's all cool.
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The only real negatives I see are the death by sunlight and requirement to drink blood. If those were out of the question I'd do it just for the immortality, never mind the other stuff.