I don't usually keep computers around anymore unless I can find a use for them. My fiance doesn't like computers laying all around the house.
I have:
2 White MacBooks (one C2D, one CD) - One for me and one for her.
24" iMac aluminum (2.4 GHz, 4 GB RAM) - My photography and business workhorse.
iMac G4 (15" USB 2.0, 1 GHz, 2 GB RAM) - Lives in the kitchen as a recipe computer.
iBook G3 - Now converted to a digital picture frame, so it hangs on the wall.
iMac G3 - Screen died in it so I made it into a cat bed!
I also have several classic Macs which I refuse to throw away because of sentimental value. They are in a closet right now, but I am sure I will find a use for them someday.