this is probably a re-post but I just stumbled upon it today and found it very interesting. summary: In advertising for wristwatches, most models are frozen with their hands smiling at 10 and 2 to frame the brand name and logo. http://www.nytimes.com/2008...
10 / 10 is symmetric. so, for the balance of the watch, I guess that 10 /10 is the best position for hands. But you know what? I rarely pay attention to this kind of details. Best. Nicolas