If audio is your hobby then the odds are good that you have more than one system. That's what hobbyists do -- they acquire and experiment with things! There are different ways that plays out. Some focus only on a single system, constantly looking for upgrades to get the ultimate experience. Others have multiple different pieces of kit which they rotate through their one system with the unused items sitting in the basement, waiting their turn. Or, as others have noted, they have multiple systems in different rooms, each with its own charm.
And the above is not a black or white choice. There's a continuum and one can land anywhere along the line as to how you approach your hobby.
I have two "serious" systems with speakers, one in the living room and another in a sunroom off our bedroom. Then there are several headphone setups (great when I want to listen and the wife doesn't want to be disturbed).
