I recently started re-watching Ah! My Goddess. Belldandy made an excellent point, and I wish I could remember exactly what she said, but basically, people shouldn't be judged for things they have no control over. Despite Keiichi being only 5' 6", and Belldandy probably about 5' 9", she points out his compassion, kindness, and dedication are far more determinant of his status within society, thus making him a much better partner... or something like that.