What is one thing that many people don't know about you?

I've been partly deaf since I was born.
I can hear the lower and top end of sounds well, but struggle with the middle range, which consequently means that if I'm in a group of people I struggle to hear what's going on around me.
It means that sometimes I can appear aloof, as though I'm not really taking part in the conversation, when in actual fact I can't actually hear it properly because I can't pick up on the speaker's voice.
I have a hearing aid, but don't wear it as it picks up all the ambient sound and makes the problem even worse!