Musically, ARTPOP is my favorite. But for promo/performances/appearances/etc. I'd have to say Born This Way. Hoping the ARTPOP era truly takes off, though.
Beside the succes that isn't as high as I had expected, the ARTPOP era. I love the music, the outfits, performances,… I really hope that she can be as succesful as during TFM era once again.