I only buy a console when I am certain it will have enough games to keep me interested. Also, if there are competitive consoles, then I will only pick the one that holds the most interest for me. As such, I have skipped the GameCube and a few other Nintendo handhelds (especially when they did not make a generation leap forward in what they played).
But in general, I own most Nintendo consoles and can currently play anything I want through backwards compatibility and whatnot.
[font=arial,helvetica,sans-serif]I did not buy every console Nintendo has made, BUT! That does not mean that I WON'T buy all of them, just at times I see fit to buy.[/font]