well for you I like it straight best. It might look good wavy/curly BUT I don't like how you have it. it seems to show-girlish. A more natural wavy look would look better on you. But you are very attractive either way but for you I like your straight pics better.
But on a girl in general I usually prefer wavy hair. especially if she is blond (because my hair is straight.)
I live wavy hair the most. The type that definitely has an uplift wave to it, but then it's like you take your hands and just lightly scrunch up the bottom of your hair and then kind of wave your head around a bit lol. That way it doesn't seem "too styled" but at the same time it doesn't look unkept either. I think you look best with straight though :)