How much do your parents' reading tastes affect your own?
My dad was a slow reader (but very gifted in math science) and didn't read a book all the way through until as a teenager he picked up a copy of Jaws my grandmother had laying around and found himself hooked. I think that is a very easy example of how parents can influence the reading habits of their children. If your bored and have no money or no way to get anywhere you might just pick up the first book you see.
Being in the education world I know how important it is for parents to read their children and sometimes the taste of the parent is filtered through. My MIL was in school and a single mom when my husband was young so his bedtime stories consisted of textbooks and I'm sure that he enjoyed partially because he could say words that other people didn't know;) My dad I think put more of his reading taste into read-alouds than my mom. He read The Hobbitt to my sister and me while my mom read Little Women and The American Girl books with me.
I've had lots of enjoyable conversations with my dad about the books he loves Lord of the Rings, the Vampire Chronicles, the Witching Hour trilogy, just about anything by Issac Asimov, and now The Wheel of Time books. So much that I can hold decent conversations without really having read them and I do intend to read them all, but The Lord of the Rings and Wheel of Time books (too long and not really my thing). I've discovered lots of books and authors that I like through my mom who likes things with more realism and since she doesn't this obsession with keeping books like my dad and husband do I've gotten alot of books from her and my grandma. My husband makes fun of me because I always come back with bags of books.
Sorry for the ramble and I can cut if people think it's too long.