"It's not that I find it hard to meet girls - they do come up and chat me up from time to time. Sometimes I'm interested, I tend not to go for the prettier ones. I prefer the quirkier types"

Rupert Grint's quote suggests that he is not having problem discovering girls to talk to, as they typically come up and chat him up. He also implies that he is selective in who he picks to pursue, as he tends to choose the "quirkier types" instead of the "prettier ones". This might be translated as him being more interested in someone's character than their physical look. It might likewise suggest that he is trying to find someone who is distinct and sticks out from the crowd. Eventually, Rupert Grint's quote indicates that he is searching for someone who is fascinating and has a strong character, instead of somebody who is merely attractive.