In what extend are we defined by our habits?

"Addiction" sometimes gets a bad rap. For instance, at the onset I hated going to the gym, I really struggled to make myself go. After three weeks it became a habit, and from there, an "addiction" where I felt miserable if I didn't go. I had to modify m behavior so that it didn't become an obsession, I recognized it was happening. Now I have things in balance. But you're quite right about your observation.