Just in case anyone missed this on reddit, here is a link to vampires and their feeding animation/ drain life and massive quest line spoilers if u want...

the feed animation i think looks awesome!

http://www.twitch.tv/ninerapture/c/3861520

I watched the first 30 seconds and realized I wanted to experience this spontaneously. So, I opted out at the first mention of "quest".

The temptation is... tolerable, for now.

Oh wow, I did not even know they were even close to putting it in the game. Thanks for post!