I think it has a lot to do with rather you are right handed or left handed. This determines generally which eye is dominant for right handed folks the left eye is generally more dominant and the opposite for the left handed folks. We tend to favor movement where the dominant eye can have a clearer view. So right handed folks - the majority of folks, tend to cut counter clockwise. Now this is just my opinion of course I do not have any scientific facts to back it up, however, it makes sense.
DW