Looks like you have a lot of different ideas going, your spread looks pretty balanced. Check out my vampires if you want to see a more casual view of how to play this awesome tribe. http://www.mtgvault.com/ViewDeck.aspx?DeckID=108140
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Looks like fun, check out my casual vamps! http://www.mtgvault.com/ViewDeck.aspx?DeckID=108140
Nice deck mate, check out my casual vampire deck it's also a lot of fun to play! http://www.mtgvault.com/ViewDeck.aspx?DeckID=108140
I find Kalitas is a bit too slow for an aggro vamp build, Drana is alot easier to get out and she has a pretty niftty ability to eat creatures toughness and buff her power until end of turn. You could also utilize fetchlands like Verdant Catacombs or Marsh flats to recover your bloodghasts. I haven't tried the buried alive tech to get all four vamps but it seemed like it could work good.
Seems a little vulnerable to mass agro, you don't really have any answers in the form of a boardwipe, just removal or creature stealing. As viable as it seems I have played a concept simmilar to the one posted above, and your planeswalker will just be sitting in hand/deck for a majority of the game. By the time you play him you're either dead or going to win anyhow, so maybe consider a boardwipe and some actual creatures to enable you to keep the game going long enough to play Bolas as your win con.
Not a bad start to your build, have you ever considered running Bloodchiefs Ascension? I've also noticed how amazing fetchlands are with Bloodghasts, and recurring both the fetchland and perhaps a highborn or gatekeeper by using Grim Discovery, which allows you to get a creature & or a land.
I think you build nicely around the fact that you will be saccing your bloodghast, or even discarding it since you are recurring it with fetchlands and regular land drops anyhow. What I have noticed when running big bad black creatures is that white decks are so much more likely to exile them before they become too huge of a threat. Did you ever think to go on the offensive with the tokens? It might be silly but throwing a 1 cost Bushwhacker with enough to kick it could be hilarious to shift the attention from the Aby to the horde of 1/2 hasted tokens led by that Bushwhacker. I don't know, in truth your build is geared exclusively toward smashing them with agro damage, more than most decks can muster that early game.