So I have noticed one thing about oils... you have to wait a l-o-n-g time between layers/colors/etc... what have you.
Now, I knew this intellectually, but I have never realized in it actual practice; this is both a trial & blessing! It not only forces you to be patient, but it also allows you time to start or work on other paintings, drawings, etc!! This is a fascinating concept to me because, for the most part, watercolor is a demanding medium, and requires constant attention while in process.
As a result of this windfall of extra time, I started 2 more paintings. I have now, in the past week, began more oil paintings than I have ever painted in my life... weird.