First of all, wow. When I saw this in my messages I was blown away, and even more when I saw it full-view.
Vision: Incredible - there's just such a story behind all of this, and with the nick in his ear and the way he looks off into the distance with the sun behind him...it's absurdly perfect.
Originality: Had to give you 4 stars on this one - because it's MLP, which makes it not exactly original, and because there are quite a few pictures done in this manner. However, doing it in an open field, with the rain as well, makes it look more original than it would have.
Technique: Perfect! I'm still trying to figure out how you managed to do all of those clouds, and the little grass/hay/thing blades so expertly. I keep looking over it and finding a new detail each time, and the woodland in the background is just lovely. His eyes are done with such depth. However, I feel like his raised foreleg is raised a bit too far for him to just be walking. I would think the bent joint should come to about his chest level, not above it as it is now. And he doesn't look wet from the rain, either, which seems a bit odd, unless it just started.
Impact: I really am blown away by this image, don't get me wrong. However, his cutie mark - a flash drive? - and the background seem to clash a bit, and the way he's looking off with no idea what he's looking at makes it kind of off.
Overall this is just such a wonderful picture. Bravo.
This is a striking piece. The sense of space well played out and the objects clear and well described. There's a good use of overall contrast.
Some constructive critique:
What stands out most to me here is the pony. That's good, it's the focus after all. However it doesn't feel like the pony is integrated into the space as much as it could be. I see you've brought a bit of the color of the field into the pony but I'd like just a bit more, perhaps in the shadow shapes to really integrate it into the space. Shadows have color after all.
On the pony itself, the ear is a bit stone like in appearance. It helps to consider the ear as very thin and also semi transparent. This prevents any large shadows from existing in the upper part of the ear and also gives you an opportunity to have light shining through the ear a little, creating a neat effect.
The green of the eyes draws a lot of attention. Again, it's a focus, it is supposed to. It may be my subjective opinion but I'd like a little more overall contrast on the pony to compete with that attention. Of course if you do that the contrast of other parts of the piece would need to change as well to keep things stylistically consistent.
It's hidden a bit, but the spine is a little flat.
I hope this helps. As a whole I enjoy your style and the painterly approach to the textures.
As always with my critiques, the star rating system is strange to me for critique... Critique is for improvement, not rating.