What is your favorite ...?

"Mom, what is your favorite book?"  my daughter asks as we ride down the road.  Moments later more questions - What is your favorite land animal?  Who is your favorite author?  What is your favorite color?  and on and on.

It is wonderful to know that she is interested in me, but it makes me sad that I never have an actual answer.  The only reply I ever have is, "I don't know."  Am I this indecisive?  Am I so busy I don't stop to think of my own likes?  Am I the only one like this?

So I have decided that over the next few weeks I need to figure out my favorites.  Just how does one go about this?  Is it the first thing that pops into my head?  Is it a feeling I get when I say a certain thing? Or is it something else?

Now, which to tackle first?