I have bone straight hair, so I don't have a lot of useful tips to offer, but I wanted to chime in and say that your hair in photo #6 is just beautiful on you, and that if you wanted to go shorter (a la Aida) - it will look fabulous, I'm sure of it.
Just wanted to add that hair styling products, shampoo/conditioner seem to make a huge difference. Even though I have straight, blunt-cut hair, I am also prone to frizzies and the like. The right cut, and the right styling products will be just the ticket. I'm not going to recommend any particular product, because my hair isn't curly at all, and maybe some of the stuff I use wouldn't work on curly hair - let's hope that maybe Aida can chime in on this aspect.
In any case, I do think you could go shorter if you wanted to, and I think the way your hair looks in pic #6 is just fantastic on you.