Do you prefer your shoes to have a little room to move or a snug fit. I'm kind of torn because my left foot is about 1/2 size bigger than my right. I usually by shoes that leave about a 1/2 thumb space for my left foot but that allows my right to slide around a bit. I've been thinking about getting my next pair 1/2 size smaller but that may cause problems with my left foot. How do you size up your shoes?