For me ultimately it has to be the 12" to the foot one that is the real inspiration. but on topic there wasn't one single layout that made me think "I'd have that at home" until I saw Biggleswade (at Biggleswade), until then I had seen cameos and parts of layouts that I liked and fancied recreating, but not a complete layout.
Biggleswade changed that, I saw that you could recreate a location well known (to me) extremely accurately,with prototypical operation and make it look and run well in 00.
But
Then I found RMWeb and on here there is so much more, Peterborough North, If I can come somewhere near the stock and look that Gilbert is achieving then I'll be happy, same goes for Eastwood Town Gordon is a bit Stop/start like me but when he starts he produces some superb looking track and environs, I find his progress is inspirational.
I know I lean towards Eastern region but it's what I grew up with.