Mike,
Yes, we do have a few trains displayed around the house, at my wife's insistence. She likes the trains and is very supportive in all of my train activities, both at home and at the clubs. If I mention a new locomotive, passenger set, accessory, etc. she will say "why don't you buy it. I am very lucky.
Entryway:
Lionel Century Club PRR 671 and De Witt Clinton
Hallway into train room:
Shelves in the train room:
Shelves in the laundry room: