I think that "double life" feeling is normal for people who have an avocation. Maybe it's more noticeable for people who actually like their day jobs, though---if your job is an unpleasant "just a job" thing, you likely won't feel very torn between it and your "real" life.

The two used to be more integrated for me, when I was travelling for work with a consistent group of people. There were a lot of pretty serious travel photographers in that group, though not very much use of film. (Admittedly, digital was a real convenience in that everyone could share their photos at the end of the meeting---people used to drop them on the meeting file server so that anyone who wanted to could download a copy of the whole pile. It was fun and would have been impractical with film.)

-NT