2. I Love How You Don’t Care What You Look like

This is a great backhanded compliment, because it's easy to make it sound genuine.

You just have to go on about how you spend hours in the bathroom trying to get your hair and makeup perfect, but you wish you could just step out of the house without caring like she does.

Even though it sounds like you're commending her confidence, you're really saying that she looks like a mess.