I also mostly agree with Rol's list. However, I actually see point 1 as one of their greatest strenghs. Look how Sony fails over and over again to create such a mascot franchise.
My weakest point as of today is the lack of new ideas, regarding new IP's or the current franchises. They haven't brought up a significant new IP since Pikmin (okay Wii Sports changed the industry, but it's still not a traditional game) and their newest installments of well known franchises feel like remakes of older iterations.
That said, I still enjoy Nintendo games and I'm glad they're still around.