3D World: I like this. I think it's got that Super Mario Galaxy vibe where it just throws new ideas and concepts at you each level, so I'm assuming the fun value of that varies per person. It's definitely alot more fun with friends though, mostly for the absolute chaos and hectivity. I think we need more 3D platformers with multiplayer, and the fact that it has online is a major plus.

Bowser's Fury: I have very mixed feelings about this game. I'm going to split up my thoughts of this game into Pros and Cons

Pros:
• It's really nice to see Bowser Jr in a main role, and it's nice to have a game without Peach at all.
• I really love having powerups in this more open-ended Mario game. With games like 64 and Galaxy, most of them worked on a time limit so it's nice to see them actually brought in efficiently, and the storage mechanic isn't bad either.
• I like that all the Cat Shines were visible on the map compared to Odyssey where you just had to figure out where the egregiously hidden moons are.
• I like the darker atmosphere of this game, Bowser in his Fury state looks cool and the boss fights are legitimately the best in the mainline series.
• The game looks gorgeous, and the cat theming on the enemies is pretty cute. The just-straight-up-actual cats are even cuter though especially the Mama Cat and her kittens.
Cons:
• Sure, the level is big and expansive but this game is still using the 3D World engine, and the control scheme mostly suffers from it. It would really benefit having a health bar and to fly upwards when you hit lava instead of just dying on the spot. Also imagine a 3D Mario game with no triple jump. Not fun.
• This might be the biggest problem with this game: Bowser in his Fury Mode. It affects the game HEAVILY. It's sort of cool sometimes, he makes platforms for you and of course he goes away pretty quickly if you collect a Cat Shine, but there's almost no way to tell when he's going to go into his Fury Mode. Sure, you can look at him and how high he is gives you an indication, and of course when it starts raining it means he's going to turn in seconds, but it would be much more beneficial if there was some sort of meter, akin to the moon from Majora's Mask. Once he goes Fury Mode, however, it's inconsistent how long he'll be in that form. Sometimes he'll just leave on his own accord, but other times he won't go away until you get a Cat Shine. Even then, sometimes he'll turn just moments after collecting one.
You also need Bowser to collect specific Cat Shines hidden behind Bowser Blocks. Of course, that brings up the matter of waiting for him to turn so he can break specific Bowser Blocks to collect the Shines behind them, but then he slinks back into the ocean, and then you have to wait AGAIN for him to come out to break a different set of Bowser Blocks, and so on. As stated before, sometimes he'll go away on his own and sometimes he won't, and when he doesn't go away on his own it can make whatever mission you decide to collect intensely annoying, what with him blasting his fire breath at you, pillars and platforms spawning up, and fire raining from the sky. Closer to when you unlock the Golden Bell, the Shines will stop working on Bowser so you have to just make a mad dash to collect any you missed. Did I mention there are some Shines you CAN'T get with Bowser in his Fury Mode?

All in all, Bowser's Fury was a decent time but I'm more interested in the potential it has. The aesthetics, the music, and most of the gameplay elements are great. It very much feels like a short side thing or a test to something new they can do with Mario, and I really like that. I want them to take all the things that worked here, and make a game that's even better.