That was a quick fav', yes. Rarity's face especially has a bit of a "disney"ish tone to it, which I very much like, since it's subtle enough to just be a faint hint of it, as opposed to being overly-done. Donno if that's what you were going for, but it's something that crossed my mind as the picture was loading.
This is probably one of the best pony drawings that I have seen for some specific reasons. The design is reminicent of g3 but still retains a very beautiful style which I think you are one of the only artists to pull it off. Also I just love the detail and life that you put into this piece. It is very beautiful and I hope to see more in the future! Kind regards, Princess Luna
The soft shading here is quite lovely. So are those beautiful intricate eyelashes. But that hair. Just... that hair. You handled them curls and all the separate strands so well. That jumble of different strands curling independently of each other is so beautiful. Well done!