My third vector of Applejack.

I want to first make sure that you know I don't want to seem harsh in any way; I want this to be useful for your newer creations.
The vector is great--the lines are pretty uniform, the only inconsistency would be the ponytail holder (no pun intended), that has a thinner and somewhat awkward outline. Granted it's only noticeable at closeup, so it's not too big of an issue.
The other side of this critique is, sadly, the bad part.
Not like it's bad, per se, but the originality--or lack thereof. This pose is one that can be seen in a screencap of the show itself. I'd prefer it, and I'm sure others might, if you did original poses and situations. Your icon, for instance, is cool and original. The poses you currently do aren't bad, they just aren't new. It doesn't matter if you try different things and fail; broadening your horizons and persevering will only improve your capabilities! c: