As long as Nintendo keeps making Mario platformers, I'll contunie to buy, play and very much enjoy them. They're consistantly among the best platformers in their generation. I have no interest in Mario Kart, Party, Tennis, Baseball or whatever, but others enjoy them and I have no problem with that. If a sequel to Luigi's Mansion comes out for the Revo, I'll be among the first to buy that one.
Apart from the NES, the current Nintendo system was never my only console per generation, but I've always bought one, and always enjoyed it.