There was a long thread about who unclips how and why a few months ago (I spend too much time here ). Turns out most (though not all) like to start with their dominant foot clipped in. Just like it's more common to be right-hand dominant than left, it's more common to be right-foot dominant. Thus many a rightie who unclips left!

I'm a leftie who is right-foot dominant. So I'm a leftie who unclips left most of the time. Though I can unclip right if I'm in danger of falling .