perhaps you can ask yourself what do you shoot.
i heard sayings that the larger the sensor or film, the better the tonality... and hence many said this is good for landscape and portraits..
as for this tonality stuff, i have yet to be very convinced by it..
i did asked Adam Burton, who is a very successful and famous landscape photographer, he said you only notice the difference when you print big.
anyway, i think photography is kind of like art, there is no right or wrong..