Planning layouts has become a full-time sideline of the hobby for me. Sometimes, occasionally, I actually build another layout.
I did a pretty good good designing my current HO layout "core module" because I've been essentially satisfied with it for 35+ years. I've had some variety with changing the yard-on-a-shelf addition to it.
With 3-rail O-gauge I've enjoyed the fun and flexibility of trying out different track arrangements without trying to build a large "permanent" layout. I currently have about 400 feet of "temporary" O-gauge track in operation.
