when I play vampires, I determine what bloodline they have on some particular save for example, Save A vampire is from Buffy so I try to make all vampires in that particular save looks like the one and have power/weakness like that in the buffy, in different save I use different vampire from different media or maybe mixing everything, I usually disable pregnancy for mostly all female vampire and only some to a male vampire or you know let them have childrens before becoming one and also I'd stop vampire teen aging altogether. their behavior before vampire determine how I play them as vampire, if they were mean before, I played them as feral vampire later.