I'm not really interestend in MLP and I'm browsing randomly, but... I have to admit this is quite a piece of art. So much detail, hell, I'm amazed by pretty much every single thing I look at. Also: From the look on his face, I wouldn't want to have to try to get past him. Or her.
So... so very interesting. His eyes show that he is ready for something but they also feel like they are giving off a hint of almost sorrow. The fact that he is in the rain also adds to the almost dreary aspect of the picture but he also gives off an air of confidence like what he is doing he knows will work in some way. I love the way it sort of fades into darkness on the right.