Mine is Aurora Dream. Dear My Future could have been my favorite, but they lack a lot of stuffs like solo performances for Mia and the others and the Prism Queen Cup. Rainbow Live was good too. (But my favorite character is Reina). And I started watching around February last year.
Yeah, DMF wasn't developed on nearly enough and lost a lot of its potential. I think my favourite characters are Mion and Rinne, with Rinne being my probable overall favourite. GIFT is one of my favourites songs aaa