Is there that one thing?

Is there anything that your man does that just annoys you in your relationship? Mine has this thing where he talks in a baby voice and at first it was very cute and funny but then it kinda took over and now he does it all the time..I have asked him to stop because now it's just annoying but he keeps doing it and says that it's hard because now it has become a habit. Do any of you have a similar thing?