Even though she ends up being the "villain", you can't help but feel for her as we've all had those awkward teenage moments where others haven't been so kind. Just the opening scene alone is enough to make me cringe thinking on other embarrassing moments as a young girl figuring out the whole puberty thing, haha.
The other two aren't toooo scary compared to some of the other films I mentioned in my opening paragraphs, so perhaps they wouldn't be the cause of too much lost sleep. I'm not sure how well Creepshow stands up, but Needful Things is one I would definitely watch again to see how my adult mind processes the lessons in with the horror.