realy nice sketches

i like 1 best

I like #3

I like the leg proportions in number three, but the pose is a little extreme for my tastes. Mebby a pose more like number three, but holding a basket like she's going to market? Otherwise, if you're definitely going with one of these, probably number four.

Extreme? Maybe I just drew it a bit bad
I have doodled up a slightly better/different pony version of #3, so I think that will be it.

3

I like three also, the pose is extreme for a human but makes rather more sense for a horse . . . if that makes sense. Seems a horse would be naturally more athletic that a human, or something, so it wouldn't be so hard to hold that pose; also, it's reminiscent of a rear. It's a bit hard to see what the raised hand is doing - I like the head title on 2. Maybe combine that with 3's pose and do something else with that arm? Holding a whip would be so cliche, but amusing.

They can definitely be recombined in any way, they're just a couple of drafts to get somewhere
I don't know if horses are more athletic, but their spines are longer and maybe bendier then
That might be fun, a shaggy pony girl in leather and whip

I like 1 and 3

I did 3 but couldn't upload due to outtage, let me do it now