comments on my black/red standard vampires?

Hi people, I'm quite new to magic. I built this vampire deck mainly because I just like vampires but I've won 2 of the 5 games I've played and both times I went beyond 46 life. Also, from what I saw, both decks I played against were quite expensive.

http://deckbox.org/sets/347851

I'm also building a vampire edh deck which I'll post later.

Please keep in mind I'm trying to keep it on budget for now.