Your typical trainspotter:
I once saw a whole family of UK trainspotters.
The 2 sons, (age 35 - 45 !) were frantically watching outside the window , on the look out for other trains.
Once a train was spotted, they'd quickly note down something in their notebooks. (I'm guessing the locomotive type,
passenger car type and serial numbers)
Meanwhile mom and pops were enjoying the quiet ride.
Untill we passed a station with special maintance trains, rail inspection trains etc.
Pops spotted it immediately
Quickly jotted it down in his book
And enjoyed the rest of the trip with a blissfull smile on his face.
I guess he managed to add a rare species to his collection!