User blog comment:Nerakil/Did you prefer the Dawnguard faction or Volkihar clan?/@comment-110.32.71.130-20140113075532

Just one thing. If you choose Dawnguard, but want to playing around with being a vampire lord, you still can. You can ask Serana to turn you after you finish a quest near the end of the main storyline. I can't remember exactly which one though.