Tim,
I wish I could say my first belt turned out that well. One thing I picked up along the way is to use a viener (that I thinned way down) to define the flower petal coming into the center. I agree with Spencer that a little texture around the center adds alot to the final picture, I use a vertical lined thumbprint (It probably isn't the best tool for it, but it's what I got). I'm no master tooler but these are just things I have picked up from others that may help. I really didn't have a good pic of what I was trying to say but here is a flower I did on a spur strap a while back that may just help as reference. Also study Mr. Parks work alot. You could stare at his stuff for hours and not pick up a lot of little things that just make it pop a bit more. Good decorative cuts on your petals adds a lot also. Great job, keep at it, you're well on your way. Take care, RW