Hairstylists usually prefer playing with smooth and straight hair, as any style looks good on this kind of hair texture.
However, if the hair is coarse and dry then very few styles look nice, or for that matter stand well. And coarse and wavy hair needs to be straightened as often as possible in order to give the look one desires. And excessive ironing of the hair can damage it further. And then one is in for trouble.
When over treating already damaged hair, one stands the chances of loosing hair and balding at an early age. It is for this reason that people are told not to over-style their hair; as well as to opt for hairstyles that may not score too much in the fashionable styles department, but still gives the hair a more settled look.
Leaving aside coarse and damaged hair, layered straight hair styles are not too difficult to maintain, or for that matter even style. But then there is an important aspect in play here: The volume of hair. Scanty and limp straight hair also has various styling problems. Most layering styles do not go well. While after the cut blow dry makes the hair look nice, after the first wash it stands flat, with no style. It's strands upon strands.
Thus, when opting for a style for straight hair one needs to take into account the quality of the hair in order to ensure that the style does stand out one needs to take into account the quality of hair and get it treated accordingly. There are hair specialists who help improve the quality of dry and limp hair. And some stylists also work out cuts that give volume to the hair.