The characters.
In 15 and Pregnant, my favorite character was the grandmother, because she gave very excellent advice to the other family members. I did not agree with everything she said, though: She suggested that the parents give Tina's baby away for adoption, because she thought the parents were not properly equipped to take care of the baby. I disagreed with that, because I felt that the grandmother gave them very little credit and felt that the parents were very well capable of handling the baby just as they had done with three other children.
I in no way condone Rachel's behavior throughout the film, and I do not deny that she acted very bratty; I do not condone how rudely and aggressively she chewed out her parents, but I respected her feelings and agreed with some of the things she said about them and Tina. Tina was very selfish, and I felt the parents spoiled her too much. I felt that Rachel was neglected by her parents. She was not entirely neglected, of course, but I felt that she didn't receive an adequate amount of attention from them, and that she did not stand a chance of receiving their attention once Tina got pregnant.