One of the reasons I enjoy hand applique, both in wool and cotton, is that i can improvise quite a bit. I tend to be a little picky when looking at pieced items, and I notice most of the wobbles when I machine quilt. But I have found that there are times to be nearly perfect and times to just let go and enjoy. You will learn what works for you with time and you will most likely gravitate to those things (if you want to).