Can't have a discussion board on Gen VII without including the Tapu.
I was a little unsure at first but their designs have grown on me and I like the lore behind them. Backs up their Fairy typing and reinforces the Fairy type isn't just cutesy and pink all the time. Tapu Bulu wrecking the thrifty megamart because it was on sacred ground corresponds with this. These powerful deities which protect their respective lands and choose kahunas as their champions.
They've also got a pretty nifty theme when you battle them not to mention they've made their mark on the meta.