Well, they certainly hold the lion's share of my favourite games up until the early-2000s, However, while I find some aspects of the company a little disappointing now, the quality of the games they make that are designed for us gamers is unquestionable. I mean,this is the company that brought us the Mario Galaxy games (my favourite platformers of all time), Smash Bros Brawl (my favourite fighting game of all time), Skyward Sword, Animal Crossing, Pikmin, Pushmo, the Metroid Prime titles, and countless others.
So, while they could do with a few more blockbuster new IPs, I'd say quality has, at least, stayed the same.