If you become a Vampire will Vampires attack you on sight?
this is a very good question and thread ...
i would like to think once you became a vampire that other vampires would welcome you home .. the same way the darkbrotherhood and thieves guild accepted you in oblivion
HOWEVER, i know that from vampire lore (not in elderscrolls but simple vampire lore) that there are many factions and religions in vampirism, in so much that many vampires even hate themselves for being a vampire and hate other vampires. and will kill others on sight.
but i would assume 70% of the vampires would welcome you as family