If you have any type of wrist problems a 12 - 15 degree is technically neutral. Try it. Put your hands out in front of you (or better yet hold you paddle) and make a paddle stroke. By just turning the shoulders and dropping the blade toward the water, your the blade will automatically turn approximately 12 degrees depending on your height, with no twisting of the wrist.
Whoa...that much hated Trigonometry I was forced to take in school finally paid off. Oooops my nose is growing....somebody actually did the math for me.
I paddle with a 191 - 12 degree. I'm 5'5" if I really stand tall...well almost!!