Your name is well chosen. Never heard of a "dark horse" as an expression. What's in a name? Clearly a lot. Since the deadline is already over:
A brother frequently said to me: wake up Kitty (how come you believe what people say, most people are lying, you better start to do so too or they will stone you to death...) I would not change my name, I also will not shut up or lie, since that is not me.