Good points, Specter. The Wii was certainly the console of choice among "casual" players. Still, it did well for Nintendo, as it made lots of $$$. They really tapped into the mobile/casual market before the mobile market really was a thing.
That being said, there were still some more "hardcore" / "fanboy" games on the system. You had your Zelda, you had a few Mario Galaxy games, and it had Metroid Prime (a personal favorite of mine). It also had a few decent "New Play Control!" ports of GameCube games (I got both of the Pikmin ports).
Gideon, it's pretty fun so far. I'm 10 hours in and have hardly done anything story-related. I've mostly been roaming around, which is surprisingly enjoyable. The past few 3D Zelda games have run me ~35 hours to 100%, but I imagine BotW could endure 50-70 hours no problem. There's just so much to see and do.
The Wind Waker was my first and most favorite Zelda game. It was so open, so pretty, and so, so much fun. I loved the freedom in exploring the vast ocean. Many critiqued it for its cartoon-y visuals and its massive, "mundane" ocean, but personally, I enjoyed the art style and the ocean. I even bought the HD remaster for Wii U a few years back. The cartoon art style has allowed the game to look good even 10 years on. I think BotW has the potential to supersede The Wind Waker though. Time will tell!
My brother bought me three amiibo to go with the game for my birthday today.