No layout; I'm amassing a collection of "O" Gauge trains concentrating in streamlined ones. I had a tabletop layout of "N" scale trains back in the early 70s but sold off everything. Still in the same 1 BR apt I moved to at the age of 22, in Brooklyn Heights, NYC. I have a massive book and art collection, though have sold off some parts—mostly my pulp and digest-size magazines—in the last couple of years.
I had 2 display cases custom-made by Classy Woods; also have 2 of their 30" single loco display cases. Also, have a bookshelf repurposed to hold my trains (which includes a shelf of Strombecker wooden trains I've had since I was a child). Here are the 2 Classy Woods display cases:
The repurposed book case:
Top of both cases are plastic 1:50 scale models I built from kits in the 70s.