This seems like a question that is specific to you. I can't really just give you my fears as an answer. Just think of something you fear and a member of your family fears. As for the next part, fears shape our lives in many ways.
Ex: Someone with a fear of spiders will panic at the site of one and ask for help getting rid of it. A person who fears the dark will have a nightlight. Someone afraid of heights will refuse to ride a roller coaster.
Does this help?