Well, I'm a relative noob on these boards, but I had to put my two cents in.
My wife has been pretty cool about my collection. I think she chalks it up to, "He could have worse hobbies." And that she thinks I'm compensating for the toys I was deprived of as a kid. Which is probably very accurate; although I think I've managed to catch up by now...but I'm not telling her that!
I also have a little one (13 months old) around the house that has somehow managed acquired his own plethora of toys, clothes, and furniture. My collection that is on display has been relegated to two small shelves in the office and the rest is down in the basement in these giant plastic bins. Every so often stuff gets cycled through. One month it's valkryies, next month gundam, next month Star Wars lego, next month SOC...you get the picture.
The truth is I really don't mind and look forward to the day when my little guy can enjoy these toys with me. It'll be a blast!