Me too. Getting to the stage I'd need to be content with what I have. In an ideal world and if I was 20 years younger and not living on a pension, I would have some sort of early NIR set up with hand-made Jeeps, MEDs, AECs, and MPDs (Lambegman would love it!) on a layout based on the Lisburn - Banbridge bit having survived the attentions of thye UTA (or is it NTA; I get these two vehemently anti-rail groups mixed up....)
Next room would be Dugort Harbour, but a generation earlier in GSR days, then grey'n'green, then black'n'tan.
1980s Java at the end of steam, with brand new GM diesels vying with 1870s wood burning 2.4.0s for space on weed-strewn tracks.
In the West Wing, I've 1960-80 South Africa, with 19Ds, 15CAs, 12Rs, and 6Js, and a Garrett or two. Beyond that in another room, BR blue-era rural England with Metro-Cammell railcars, 24s, 25s, 26s, and 31s all over the place.
And then it would be time for my cocoa.