What is my stance?

Regular: Left foot in the front, right foot in the back. You would typically unstrap your right foot when moving in flat areas.

Goofy: Right foot in the front, left foot in the back. You would typically unstrap your left foot when moving in flat areas.

Since the BootDock is shaped specifically to the curvature of your snowboard boot, one tongue will not fit both a left and right boot, so it is important to choose accordingly.