If you've already experienced Awakening, I'd say give Echoes a shot. Fates, gameplay wise, is a more polished and balanced Awakening in a lot of places imo. Echoes is a remake of an old game, which means it's vastly different from what Awakening and Fates have to offer. It has very strange design choices overall; some of them work and are really fun, some of them not so much. The presentation is a major step up in Echoes though, as it's the first game to be fully voiced.