I like the first one, personally.  I didn't really like the way Elder Scrolls handled vampires.  As for the Foresworn, well, they always struck me as an interesting faction but they always struck me as too contrived.  The Dunmer and the Falmer have always interested me the most, possibly because the details of their history were never revealed to me.  Also, the mechanical enemies always seemed more difficult to predict than living ones and more fun to defeat as a result.