I hate that she loses things all the time. Her keys and cell phone in particular. I always tell her to find a system that works such as leaving them in the same place every time she comes in the apt, but that suggestion has not had an effect for the past year and a half....
I also hate the hair thing.
I hate that she gets upset when I am out with my friends and don't take the time to call her and talk to her for a little while, but when she is with her friends, a phone call is the last thing on her mind. Which I don't especially care about, but it's the principle of the thing.
And this list of 3 extremely minor things took me a long time to think up, so I have one heck of an amazing woman!