As a seller of second-hand children's books, I like to stock my shelves with books from my childhood as well as highly-regarded books from all decades. The heroines of most books I carry and remember reading are generally normal teen-aged girls. There's Harriet the Spy, Nancy Drew, Laura Ingalls Wilder, Lenore from Girl of the Limberlost, Ramona, Trixie Belden. These girls all had plucky personalities, and a sense of adventure. The girls from Judy Blume novels fretted over getting their first period or finding their first romantic relationship.
And sure, there's always been fluff along the lines of Sweet Valley High, but those stories were harmless enough accounts of proms, dates and summer vacations.
According to Naomi Wolf, however, normal teen-aged heroines are quickly becoming a thing of the past.