I very much love the innocent expression of wonder on the Pinkie on the front left as she slowly discoveres the world around her. All that's missing is a butterfly sitting on her muzzle or something.
This makes for a great desktop-, and an even better Smart Phone background. Why is it even better on the phone? Because no matter if I hold it horizontal or vertical, that Pinkie on the right front always looks straight at me.
As you may guess, I wasn't quite a fan of how "Too Many Pinkie Pies" ended.
Heh, instead of blasting them all, wouldn't it have been a cute ending if they'd given the Pinkies a plot of land to build their own "Pinkieville" or something?