I have over 300 hours played on vanilla and have completed all of the major quest chains as well as a large majority of side quests. Most of the dungeons are marked as cleared (I've done a lot of them multiple times as well due to the radiant quests). I think I've uncovered almost every location on the map and the only thing left seems to be the randomly generated and repeatable quests.

My quest journal is looking rather sparse these days and I want to continue my adventure and my character progression.

So it's time to dive deeper into this awesome game. I am going to obviously buy all of the DLC, but I was wondering which one is better to start with? Dragonborn or Dawnguard. Do I have to get one before the other or are they playable in any order?

Thanks for any feedback!