Wow. All these drawings are pretty nice. I like them. Now, for some critical info.
Now that I got the idea on your style of drawing, here are a couple of improvements I think could be improved.
- The position of the legs could. On the second one with the pony in the night, I can see the right foreleg looking a bit weirdly drawn. The merpony drawing I thing could be lowered a bit, but probably not too much in need of a change.
-I could be slightly more picky. The muzzle size kinda varies with each drawing. Especially from the last one, which is noticeably shorter than the first two.
And that is about it for the possible improvements. You got pretty neat drawings. Hope this helps enough. You got great potential in art. Wish you the best in your drawing.