It has to be Grosmont. It has everything, including a four-track level crossing, junction with Network Rail, plenty of stock movements, right at centre of the town (or is it village?), lovely signalbox, and atmosphere - and last time I was there, on a filthy day, I was allowed into the ladies' waiting room to sit in front of the roaring fire. What could be better? And yes, the NYMR is my favourite of them all - but I have Yorkshire blood in me so perhaps I am biased!
Other than that - Bristol Temple Meads - where I spent most of my waking hours as a boy in the 1950s.
Ian J