What do you think of my MTG vampire deck. what should i change and what are my weaknesses?

We'll your first weakness is the light stay away,and garlic could make you itchy,oh and full moon's bring werewolf's i hear they hate vampires...lol. The only thing i wouldn't approve of your deck is the ratio of sorcery(including anything but lands and creatures)to creatures but that changes from person to person iv'e never done good with a lot of sorcery's and maybe a few more lands and special ones like Rakdos carimium (for example)and an artifact creature or two other wise a creature with protection from black will "bend you over" other than that looks great to me!