I think there may be a lot of disagreement here and elsewhere about the TF10 because it is good enough to be very revealing of the source. Mine sound ENTIRELY different based on which source I am listening too. On my laptop they sound flat and thin with almost no dynamic range because my laptop soundcard is terrible. On my 7G iPod Classic, they sound a little thin and somewhat v-shaped unless I run them through my iBasso P-3+ which pushes the midrange, in which case they sound perfectly flat but a smidgen compressed on the soundstage. On my 5.5G iPod through the same P-3+ they sound like old Conrad Johnson tube amps, almost all midrange and almost sickly sweet with a compressed soundstage, but with an enormous amount of inner detail. And they sound like absolute perfection when I listen through my 5.5G iPod and my RSA Hornet.
In my book they are so revealing because they are actually very neutral.