Well I've only recently added an A1200 to my retro collection, but the girlfriend is fairly cool with it. Up until very recently I had a Capcom Impress japanese arcade cabinet in our front room which was far less popular as it took up quite a lot of space in our rather small flat! All my games stuff pretty much just takes up a couple of shelving units so I get away with that. She doesn't mind the actual gaming, "boys and their toys" and actually says my hobby is quite endearing.
I do get her to play the odd game occasionally, we played mario kart on the wii to death until I sold the thing to get a 360
In fact she went a few rounds with me on SF4 last night!