I suspect this is a different strokes for different folks thing. 13" is just ideal for me. Also I've adjusted my workflow so that with multiple desktops, having

I suspect this is a different strokes for different folks thing. 13" is just ideal for me. Also I've adjusted my workflow so that with multiple desktops, having one screen is not that big an issue. 15 means it's heavy enough that I can't just forget that it's even in my bag.