It seems so stereotypical, is this really a common obsession?
I like trains, I don't think about trains that much but trains are cool. Sadly I've never gotten to ride in a real train (subway doesn't count) but I think it'd be a fun way to travel. When I was a kid I was more obsessed with toy cars, and miniature towns in general, roads, railways, buildings, etc. If I had more space I've considered building a miniature town as a hobby, complete with a railway.
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"The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. We live on a placid island of ignorance in the midst of black seas of infinity, and it was not meant that we should voyage far. The sciences, each straining in its own direction, have hitherto harmed us little; but some day the piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the deadly light into the peace and safety of a new dark age"