I have an ear deformity from birth. A microtia, which is on one side. It means my left ear is basically just a lobe and some bone, but not in the right formation, so it just looks like the back, cone section of the ear is missing, really. Also inside the ear drum is made from bone (should be a skin membrane), while the hammer, stirrup and anvil 'bones' are made up of tissue that isn't bone, but more a kind of cartelidge. It's all a bit random, and my hearing is slightly impaired. But I am like this for a reason, and I won't change for anybody or the world, because I am happy the way things are.
Hope that is some useful guidance.