Marlon,
First off, if this is the first Sheriden pattern you have drawn, it looks great. I struggle trememdously to draw and create. I am much better at copying others.
As far as critique: The main thing I see is that you started in the bottom left corner (I am assuming that it is rotated because of where you signed it) very tight. So tight in that the leaves were clipped over the edge, That is OK, but no where else in the pic does it overhang the edge. I would say that you should have continued with the overhanging leaves or not had the first ones. You then continued up and to the left more than to the right, it gives the pattern a top heavy appearance. Possibly if the leaf closest to the signature was rotated a little more down and there was a turnback stem (like on the left near the top) it would have ballanced more. There is also a couple spots where the stems turn into lines.
You show great promise in your work of becoming a master at this artform.