The sunglasses/glasses whichever it is, for me, looked best with the curly hair :3 idk. This style of art makes me think of Korean manhwa and I just felt the curly hair fit xD
2nd fave would be pony tail. The last of the three was kinda eh for me. Just don't see that with the glasses o3o plus the other two look more sophisticated (?) .
All in all--Pony tail gives a more mysterious feel. Curly hair give a more "I have secrets, but I wouldn't mind telling you if you're special"---type of guy. Ahaha.