suddenly i remembered a friend of mine who likes to use the biggest possible aperture... his portraits are nice but when i saw his other shots beside portraits on full screen then i find it funny...
e.g. 1: Event Coverage: every photo got shallow DOF (albeit his lens producing nice bokeh)... subject very clear but no idea of what the event is about...
e.g. 2: Car shots: focused on windscreen with f/3.5 and then found only windscreen is sharp, all others blur, he stopped down to f/4 and said that's better... but i see beside the windscreen is sharp, only side mirror get sharper... front lights, logo, bumper still blur...
e.g. 3: Landscape: he said he stopped down considerable amount to f/5.6... but i see shallow DOF landscape photos a little bit weird...
on screen review of his photos i would say his "favorite" aperture being f/2.8 - f/4... but really good to have a "favorite" aperture? I would say no...