It takes confidence for any guy to talk to any girl. Taller girls or beautiful girls can require more though. And everyone has their personal preferences. I have a friend who won't date a girl shorter than 5'10", but personally, I like girls my height (much less than that, lol) because I like dancing a lot, and it's harder to dance with a girl much taller than myself. Most guys don't like dancing anyway, so that isn't a common problem, haha.