Brilliant stuff, with the designs translated awesomely to human form and the poses capture each pony very well. Especially AJ, it just expresses 'sexy and strong' so well.

Although Twilight is on the opposite end of that spectrum; her pose is rather bland. I know that's kinda standard for Twilight, since her personality is hard to visually capture, but the position of her arms and legs in an attempted pose just work against her, here.

p.s. In regards to Rarity, there must be a difference between pale and just plain white, surely. It's especially off-putting since everypony else has similar skin shades.

p.p.s. Three years old, but still worth critiquing.