mmm, i suppose thats true.
but i also see alot of people with highlights, frostings, different coloured, etc, and it does help to emphasize the different strands.
personally, i dont see one way better than the other. i think it depends on the mood, and style of the picture. some can pull it off, others cant. in order to have the detail of hair you must have the detail everywhere else. but if everywhere else is simple, then use a simple hairstyle.
mmm.. personally i see more of the mid colours in hair.. extreme highlights and deep shadows blend. but its the mid colours that define the hair i feel. by drawing simple, it appears more uniform, perfect..
by throwing in strands, you can add direction to hair flow, you can develope a texture.
mmm i duno..
again i dont feel theres a right or wrong.. it depends on the piece..
oh, and thanks