As far as lore goes, I'm a terrible vampire; I NEVER feed, unless for the New Alliances mission or I happen to have a blood potion when I need my health replenished. Other than that, I see no point in feeding. The fire weakness can be easily countered with enchanted armor, and the abilities at stage 4 just make me more powerful. For me anyway, there's no logical benefit to feeding.
Am I the only one who feels this way, or are there other blood-starved vampires out there like me?