Comment Get it right (Score 5, Interesting) 92
Assuming this is the equivalent of the task bar... I may be crazy but to me the natural position is right. In general, because I mostly do web dev and so work with code and web pages, vertical space is far more precious to me than the relatively abundant horizontal space. So I have my task bar/dock as a vertical column on the right, with the Start button at the top, rather than a mostly empty strip along the bottom.
I think there have been desktop systems that had it this way out of the box (NextStep?).
Of course on rotated monitors and vertically-oriented tablets I stick it at the bottom.