The large ears considered fortunate, but the little ones are unlucky. The size of the ears is related to the size of the face rather than absolute. It is huge if the ear takes up a substantial amount. Big ears are associated with robust and active persons, whereas tiny ears are associated with poor health and a reserved demeanor in early childhood. Actually, there is no real reason why ears should be any particular size. They can be small or large depending on one's perspective.
In mythology, Ears were among the many body parts given to humans by Zeus as a gift for their intelligence. He gave people large ears to hear uncommon sounds and speak up about them, and small ears to not show anger.
In ancient Greece, it was believed that those who could not hear would never grow old because of their innocent looks. This is why we see young women with small ears being advertised as servants or slaves. Today, this idea is only popular in Japan where small ears are seen as cute.
Big ears are common in Asia, particularly China, India, and Japan. In America, large ears are most common among black individuals. There are several reasons why big ears are common in these areas including genetics and the way ears develop under the influence of hormones.
Specifically, in Asians, it is thought that having large ears is an inherited trait because of the effect that each parent's ears have on their children's ears.
Large ears may be seen as ugly. It is subjective whether or not it would be a "deal-breaker." Personally, I wouldn't consider it a "deal-breaker," but others would. As others have pointed out, others may even find it appealing. Whether it is attractive or not is dependent on one's personal opinion of ear size.
However, hearing ability is also dependent on one's personal opinion of ear size. If you have large ears and poor hearing then no, it isn't going to affect your life in any way. But if you have small ears and good hearing then too, it isn't going to affect your life in any way. Hearing ability is dependent on one's preference and personal opinion of how large someone's ears are. One cannot judge the hearing ability of another by their own ear size because it is relative.
Some people believe that since we can hear sounds with our ears they should be able to reach some sort of distance from our head. So if one has large ears, then they might want to get hearing aids to help with the difficulty hearing at such close range. However, hearing aids work best when they are fitted by an audiologist who can select the right type for you based on how you respond to different frequencies of sound. A hearing aid can never replace the role of healthy ears so don't just buy any old hearing aid off the shelf at the drugstore.
Larger ears aren't always associated with considerably improved hearing. This is mostly due to the modest size difference between small and big ears. Cupping your hand over your ear can essentially 'enlarge' the funnel you're employing to direct sound waves into your middle ear. This means that if the angle at which you are listening is relatively flat, then so will be the angles of incidence and reflection for any given frequency. Therefore, you won't hear anything beyond these angles.
The only way to improve your hearing would be to have surgery to modify the shape of your eardrum or ossicles (the tiny bones in your inner ear). The benefits of this procedure could possibly outweigh the risks, but it's not something to consider unless you suffer from significant hearing loss.
In conclusion, larger ears don't necessarily mean better hearing. However, having large ears may make it easier to find sounds that other people might miss. This could be useful if you need to locate animals or predators away from their usual noise sources.