I think Hana mentioned that to her at one point, overide, and she brushed it off with, Well, I don't want to look at the same. Or something like that.
It's just one of those personal quirky preferences people have about whom they will or won't date, which usually fall by the wayside when you meet "the one."
From Dae Jang-geum: Sun-dol: "Are you trying to dry me up and kill me? Why do you say the same things over and over every day? Rather, come and hit me once! Aigu!" But then: Dr. Lazarus: "By Grabthar's hammer, by the suns of Warvan... You shall be avenged."