Did I ever tell you about how I go to the airport just to watch families and friends reunite at the arrivals hall?
That's an unusual hobby.
Mostly, I just spend a couple of minutes watching people coming out of the airplane.
I agree that there's something pleasant about watching families be reunited.  I don't think, however, that it's healthy to go to airports just to see that!
It's only an hour. As long as I don't go there every day, it's not a problem.
If it's not obsessive, I guess there's no harm in it. You should write an article about your hobby.