Numbers at
all sliders please. Just compare, say, difficulty slider for Morrowind and for Oblivion. In first one, it is easy to select exactly whatever you wish, because center (zero) is defined as one. In second... it isn't.
Similar about character generation. It is handy to save data of your favorite face presets as numbers, it is easy to share them with others and all that.
Seriously, this is important usability thing.