6 foot 3 is not quite tall enough where its obvious in north america.
so even if you travel you might not really experience it.
its really obvious if you are around guys 6 foot 5 to 6 foot 7 in north america
i have never really spent much time around guys 6 foot 8 or above since that is so rare so i have no real data for guys that tall.
but i have spent a significant amount of time around guys in the 6 foot 5 to 6 foot 7 range and its surprising how well they do with women even the ones that have average facial features.