Each camera I own speaks its own language. Because of this each camera has its own unique way to assist me in saying what I'm trying to say. I decide which one to pick up based on the mood I'm in and the story I want to tell. I would no more intentionally sell off a second or third camera on a whim than I would intentionally forget a second or third language on a whim.
If I have several cameras from which to choose and I can't seem to ever choose one and so find myself taking less pictures and telling fewer stories, it's not the choice of cameras that is at fault.