Don't tell Nev, Bob, but I over the years I've found the huge variety of Australian railways quite tempting - American, British, Japanese prototypes running on all those track gauges ....
Unfortunately electronic calculators were invented after the scale/gauge problems had been 'sorted', but at least it means I can run my American stuff on club layouts here in Britain and the 10% scale difference means I don't take the bridges and station platform edges out!
Jason