I do something similar to avoiding cracks in tiles. On patterned floors, I always make sure I walk an even amount of steps with each foot on each color of tile. No half-halfs are allowed for me.
And, believe it or not, I can actually feel when I don't step according to my little pattern, even if I'm not looking. For example, if I step on the seperation between blue tiles and red tiles, one half of my foot will feel uncomfortable. <img src="/ubbthreads/images/graemlins/eek.gif" alt="" />
Hows that for obsessive and weird? <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
Killerzzz
