I hesitate to point out anything related to *l*gnm*nt, especially *lw*ys *v*l, but perhaps I can summarize by saying that D&D tradition is opposed to the idea of a lot of kind-hearted vampires running around.
I think all Vampire Lore is either generally or very strictly against "Vampires being Nice". Either they get totally evil by the transformation or the get gradually evil and more and more de-humanized by the lifestyle that is forced upon them.
Ser Ilyn, Ser Meryn, Queen Cersei, King Joffrey, The Tickler, The Hound, Ser Amory, Polliver, Raff the Sweetling, Weese, Dunsen, Nale, Ser Gregor Clegane and Chiswyck: Winter is coming!