The music... It's awesome. The starters seem OK, and the game is beautiful. But man I need a better look at the legendaries, mainly the moon one. Also, that region name is awesome.
The remixed music...
It fills you with determination.
EDIT: I looked at the legendaries, and right now, I'm leaning towards Sun. The bat is okay, but the lion is epic. I'm also a Leo, so that's cool. As for the starters, I really want to like Litten, but it looks grumpy. I was hoping this year I would like the fire starter, like I did with XY, but I immediately when to Froakie when I saw their final evolutions. So, as of right now, Rowlet and Popplio are my picks.