Out of those all recolours I particularly like Fluttershy's colours on Twilight's template. I also like how Rarity's colours look on AJ template. She looks so... refined? I dunno, but there's something charming about her. Also, FS colours on AJ look kinda... heartwarming.
Lazy Repaints (A.K.A. Palette Swaps) are a cheap way to sell the "Same thing but different", but as a fan of franchises that are guilty of this (the Mortal Kombat games and Lego's Bionicle saga to name a few) it's a layout that I've always enjoyed.