I gotta reiterate what's already been said about unicorns not all being Twilight. A bit of TK plus one thing based on your special talent; that's what most get. Twilight's one of a kind to the point where the sun goddess and leader of the country dropped everything to personally go see. She became an alicorn, making four known to exist in the entire world. You can learn to get better at your one thing, but you won't be Twilight. You won't be almost Twilight. You won't be almost one thousandth of Twilight. Stop thinking Gandalf and start thinking Fizzy from g1 (minus the teleportation) when it comes to MLP unicorns.
But nothing could beat the joy and freedom of flying (even if Dashie is as atypical a Pegasus as Twi is a Unicorn and you'd not reach her level.) Pegasus, ftw.