We seem to have several levels of Enthusiasts.
Genuine out and out Bashers/Spotters.
Those who reminisce for days of better traction(like myself).
Occasional enthusiasts.
Those who do a bit on Preserved Railways.
That's a very good analogy of the OP, as being an enthusiast was seen as a recreational past time, and covered everything from the historical side of things to taking photographs, or, bashing/gricing, etc.
I started being interested in trains on World Cup Final Day in 1966, sitting on my Uncle's garden fence watching the steam locos shunting wagons in Toton yard. Fortunately, in the 70's, I was taken on as a railway clerk and carried on being interested and as working on the railway offered you the chance to travel the country on the BR network, it was a cheap recreational hobby to ride around spotting numbers, and absorbing everything that went on at various yards, stabling points, docks and seaports. My Uncle and his son were both miners in Notts/Derbyshire and I went to various collieries and watched the MGR's being unloaded whilst they cleaned up after a shift.
Most of my railway colleagues were enthusiasts in a way, and as we all worked for BR, it was a family, whereby, getting the chance to get round a Motive Power Depot was a lot easier back then when you could request it via the Depot Supervisor, flash your ID card, tell them that you were also a Supervisor, Manager, etc, and would be allowed to visit 99 times out of 100 as you could be trusted with the Health & Safety formalities and other legal, and union practices, when walking around.
Many old railwaymen would probably agree that the Steam and BR Blue Days were the best for trainspotting, as so many varied classes of locomotives were worth watching and listening to, nowadays, I be bored stiff watching the same 'boxes on wheels Americanised locomotion' that keep appearing, you'd be surprised at the number of 'fans' around, some of the lads at Trent PSB would ring me up at work and tell me what locomotives were about on any STN's, as they knew I'd be interested and would pass the information on to others, steam specials were always well appreciated.
I doubt very much if I'd have the inclination to travel 200 miles on a whim to see a modern loco, but, I never hesitated to go and listen/watch a Deltic, Class 40, or Class 37's on Lickey bankers, for a few hours with lunch in a country pub and a quick half of the local bitter, it made the 'hobby' so much more enjoyable.
Cheerz. ex-railwayman.