Kit bashing.
Scratch building.
RMwebing.
LNER OO gauge.
Some LMS and GWR.
Building exhibition layouts.
Long walks in the snow at night.
Throwing rocks at campers and avoiding humans with cameras.
"Feature" ... hmmm ... other descriptions are also available.
Personally, I've got no problem with adverts on this site (they probably help to pay the bills) - but I'd prefer them not to cover up the content we all signed up to see and contribute to.