Is It Abnormal For An Adult To Have An Active

Is it abnormal for an adult to have an active imagination/fantasy life? I imagine myself in real life situations involving characters from my favorite TV shows. For example, I was raped and Sgt. Benson (Law &Order SVU) and Det. Rizzoli (Rizzoli & Isles) are investigating the case. I realize it is all in my imagination and will never happen. But how much imagination is TOO much?