Well, I can't say much, since I have only made a few banners, and I am crap at it. It's pretty good for your first banner. The only thing I see that you could change is stacy, her head looks a little thin, so you could just stretch her out a little. Thats about it from me. Maybe others will have some advice, but thats all I see, except maybe remember to look for pictures or cutouts with similar quality, like tint and contrast, etc.