My mother and I actually rode a steam train from Grand Central Station to a town in upstate New York (and back) and except for the smell of smoke from the engine and dining in the dining car, it didn't impress me... because, after all, that was a train, and that's what trains were. The date escapes me but it must have been when I was 8 yo or so.
I also vaguely recall a train trip to St. Petersburg in Florida and my memory tells me it was also a steam train, but this must have been ~'57 or ~'58 or so. I think by then diesels were predominant, so who knows? That was a brain-bollixed time for me since my father had passed away and my mother had re-married and...