I am in the process of switching from 37-622 to 35-622. I am not doing it for the size difference, but the ones I am switching to have reflective sidwalls and I will keep my 37-622's as spares and keep one at work and one at home. To me 32-ish to 35-is is the right size tire to commute on. Fat (enough) to be comfy and skinny enough to roll easy.