This is all I do really. Level up characters. I do it only for myself. Once at level 85, many will do some dailies for some rep gear, all will work on professions. And I will continue to have fun.
One note, just because most of the characters pictured are female, most of my characters are actually male. Especially the Blood Elves. And as you can see, there are a number of other characters in the 70s and 60s. Plus I have one more almost at 85 on another of my accounts(that I don't play as much).
And I'm still having fun!