My major concern with gnome/unity/xfce is that the default font sizes look too big and really ugly. I guess choosing the right font sizes is not so trivial give

My major concern with gnome/unity/xfce is that the default font sizes look too big and really ugly. I guess choosing the right font sizes is not so trivial given various resolutions, but on fonts, every bit of effort will be paid off. And this can certainly be achieved. I am happy with the default system fonts in Mac and Windows nearly all the time.