By varying the colors, facial expression, and position of the arms, you can make each Santa unique, with its own personality. Or make a whole fleet of identical Santas to disperse throughout your home!
If you prefer, you can make your Santa figurine in stages, putting it through multiple curing cycles. Once a piece is cured (even if only partially), it hardens enough that you no long have to worry about smooshing or leaving finger prints on the cured parts of the figure. It may be helpful to use a little liquid polymer clay as "glue" between cured and raw clay, but in many cases, the raw clay will stick to the cured clay on its own (or can be superglued into place after all the curing is done).