When I grew up, all girls worn there hair straight, long, parted in the middle. Susan Dey from The Partridge Family comes to mind as an example of this do.
Sadly, if you didn't have straight hair, you were subject to a certain degree of not-nice comments. The yearbook staff put "Known for her frizzy hair" next to my picture. I did not buy the book.
One nice thing about today's styles is that there is no designated style. You can wear it long, you can wear it short, you can wear it curly, you can wear it straight. Choose the style that most compliments your face and that works for your lifestyle.