What are these strange creatures?... they are most definitely not ponies.
I know the whole "Day and Night" shtick has been done innumerable times between our two royal fair maidens (heh), but to see one that includes Twilight in the mix is a rare sight for me. It's even more rare that I see one with humanized artwork so I figured I'd have a crack at it.
I say it's a fascinating thought, imagining how these ponies would look and act had they instead been humans. Though I can't say I regularly have such thoughts... so yes, it is fascinating.