Quite a few closet enthusiasts in the profession, especially where photography is concerned. Only knew of one pilot who was an active 'spotter' as such - i.e. interested in collecting a/c registrations.
You tend to know the one's who don't have any enthusiasm for aviation - they tend to be a very unhappy bunch with what they have/do and constantly whinge. Sometimes feel they need a serious kick up the backside and to reflect on their own unhappy lives before criticizing others....
Anyway, as for me, well known in the company for my hobby - aviation photography. Often pop outside at lunchtime with the camera.