I've always loved model trains, especially the N Scale layouts. Dad used to take me to the Model Train Exhibition in the old Sydney Town Hall, every year. I'm not really into complete realism in so far as the exact region and railroad a model should be based on, but I like running all sorts of trains....I'd probably run US layouts, though. Oz trains are still not as easy to come by, especially in the smaller scales. I've been thinking about setting one up lately....small one for starters, probably 6' x 3'. Maybe even a little smaller...5' x 2'. Then expand on it when I have more room to do so. I've got some software for track designing and such, so I'll probably come up with several layouts
Here's another really good model railway video...
Pennsylvania RR