How do I know if his hairstyle is fashionable?

Is the mode of headgear long hair or short hair this year? What is the hair look most interesting side of men and of women?

These questions cannot always be answered by a professional of the hairstyle. That's why several sites on the internet are available to Internet users trends mode and hairstyle for the coming year. However, after some research, we note that each site advocates its own mode