The nice thing about acrylics is that I can rough sketch both position and size by "blocking in" the elements of a painting and then go over it later and correct it. It's at this stage that I can test colors and composition.
I'm really enjoying this one, and I think it's mostly because I so love the colors going on. I've got Vivaldi and Mozart hangin' with me tonight while I finish this one, and I'm taking a break to go for a bike ride and get some clarity before I return to finish it.