I'm not in S scale, Z, TT or Standard gauge.....otherwise I have something in the others. I still have the Revell N scale set Mom gave me in 1968......
I still have most of my HO collection from when I switched to 3 rail O in 1993.
And I have a small collection of G scale that started as Christmas under the tree trains but grew.....Lots of O 3 rail, some On30, some HOn3....too much really!!!