Okay um... hear me out
S: AMAZING Library of games. Each time I play Pokemon, Mario, or even jokingly We Cheer 2, I have so much fun and I can see all of the thought and effort put into each game. So many special memories of pulling the GameCube controller so hard during a Mario Party 4 minigame the Wii fell into the trashcan next to the TV stand. Even the home menus were interesting.
A: I love the 3DS, but... it has some flaws. Streetpass and Spotpass were fun back in the day, but it's such a shame that they were short-lived since the console started to die out. Sure, Nintendo Wi-Fi connection was killed off so we can't properly play Wii/DS multiplayer online anymore, but exploits exist so we can all have a good time line its 2008 all over again. (I know they're both kinda unrelated, but I still make my point).
B: I love the Wii U. It's definitely not as bad as people made it seem. Some of my favorite games came from this console, like Wind Waker HD and Splatoon. But... that's it. Never really played any other games, except Nintendo Land in 2014 at 3am for new years :/
C: I haven't really touched these too much. They consoles have fun games, but my experiences with them don't even compare to the higher tiers above them.
D: okay... listen. The Switch is SO much worse than everyone makes it seem. The massive library only has less than a handful of games I actually like. Don't get me wrong, I've crammed hundreds of hours into this thing and I have good experiences with them. But... the whole thing is just a cash grab. 20 dollars a year for crummy online (more if you have families and the expansion, i am one of those unlucky people), joy con drift, etc...
I haven't truly had fun since Splatoon 2 was still alive and amazing 3 years ago. Today it just isn't worth it. I just get bored way too easy now. It's just a matter of completing a game, then waiting for it to die off before picking up a new one a few years later.
Also, just to mention, I do love the GBA from what I've played (and watched on the playground, lol thanks GBA Vid). It just wasn't enough experience for me to rank it.