Look around the forums, sure you've seen a replay or two in there. Watch some and compare them to yours and see exactly how you measure up. You can't expect to be able to make interesting and good replays when you've just begun playing, give it two or three months first.
As said, they are symmetrical, stiff and simplistic single moves with no followups. Twinswords is gay and even the kicks had instagib on. +1 for speed, 1/10. You have a lot to learn.