Legion looks like its shaping up to be awesome, but what I'm most looking forward to is the artifact quests for many of the characters I play. Each expansion I like to level by questing (at least the first time), I finish each zone before moving on to the next, for the story and to explore. Legion having the ability to start anywhere will allow me to take different routes on alts, to keep leveling somewhat fresh, or re-play zones where the story/questing was most enjoyable. I think Cataclysm may be my favorite expansion, not because it was exceptionally well done, but because it was the first
