Glad to hear other FT'ers are collectors as well. I collect mostly the 1:200 scale FlightMiniatures stuff, but am considering going the 1:400/1:500 HerpaWing route, as my office is beginning to look like a nightmare push at ORD.
We have a couple of guys here at work that actually have entire rooms devoted to this stuff -- a la model railroaders. One guy has designed his own "to scale" airfield, complete with a hub airline (meaning multiple models of the same airline) and obviously, a large international presence.
Ain't it grand being an aviation geek?!