How Unique is Your OC?
To have a unique OC, you must not stand out by appearance, but by personality, backstory, and the mistakes it makes. No one likes a Mary Sue even though it is meant to be loved by all, is your OC unique?
Ponies ponies PONIES! Are you a good pony? Do you go with the flow? Do you stand out just a little to much (like being an alicorn *cough cough*)? You need to be unique in your own special way. Let's see what you got!