I very much like it. I like the color of the coat and the idea of the mask on the pony as his attire. Honestly thats something ive never really seen on an OC due to the fact everypony wants to show thier faces. the question i want to know, is why this OC is whering a "happy" mask over his face? Quite intresting. I would say the tail looks just a bit thin, most Ocs just have a bulked up tail at the point of contact with the rear, then gradually gets bigger. But im betting thats your own personal preference. I also really like the mane, it looks it looks scruffy, yet compliments the enitre OC. As for drawing pony bodies, i would say keep practicing the proportions of the body, the adjust everything else to it it. I personally start with the head, then work my way around to the rest of the character. Practice is all it takes. Great work on this, really great job. maybe if you have the time, you could check out my artwork here in the pony art galleries. ^^