I'm only on season 2, but I agree with wataya and chihaya for master and queen. Seems like Taichi and Chihaya are the obvious ship, but thats my personal favorite couple as well.
Taichi might be a future contender for tha Master title, since learning from Wataya that a caruta master doesnt have to have natural talent but like I said, I'm only speculating since I'm only on season 2. Cant wait to catch up to season 3!