Out of the currently-available main Switch Pokémon games (Sword & Shield, Let's Go Pikachu and Eevee, Brilliant Diamond & Shining Pearl, Legends: Arceus, New Pokémon Snap), which is your favorite?
Definitely Pokémon Sword and Shield. My dad actually got me Pokémon Sword last year for a Christmas present and ever since then, I've struggled to put the game down. Despite the game omitting some older Pokémon, having a bad story in my opinion, too many cutscenes, wonky day/night system during story mode, and a bad villain team, I loved everything else about it. I loved the graphics, detail in the cities and towns, the music, the wild areas and the fact that Pokémon could appear in the overworld, making traveling in grass, caves, and water much easier and less of a hassle without Max Repel, and the competitive battling scene. While the competitive battling scene is a little lacking due to many moves being cut and many previous gen Pokémon being omitted, it was still great because Game Freak made training competitive Pokémon a lot easier with Nature Mints, Ability Capsules and Patches, Hyper Training, EV vitamins being able to max out EVs completely, and Exp. Candies. A few months later, my dad bought me Pokémon Shield for my birthday. He knows that I love Pokémon, but he had no idea that Sword and Shield are practically the same thing. lol Nonetheless, I wasn't complaining because I was able to play the Galar region again.
Pokémon Brilliant Diamond was the second Pokémon game I got for the Switch and overall, it might be my second favorite on the Switch. The thing is I'm not the biggest fan of Sinnoh because, out of all the regions, I believe it to be the most bland in terms of design and landmarks. I don't know if it's just me, but Sinnoh just seemed to have too much forests, caves, open spaces, and cities that don't really stand out. I did really enjoy the spooky locations though such as Turnback Cave, The Old Chateau, and the Darkrai event. Sinnoh also had too many requirements for HMs. Sure, the remakes incorporated the HM moves into the Pokétch, but it was still sort of a hassle to constantly use. Sword and Shield proved that HMs are 100% unnecessary. Still, I enjoyed it because I did, nonetheless, enjoy the adventure that I had in Pokémon Platinum and the remakes gave me the chance to relive most of that experience on a system with better graphics on my big screen TV, which is great.
Pokémon Legends: Arceus might be my third favorite. I enjoyed the new Pokémon catching system and the ability to partake in quests, but to be honest, I believe the game's overrated. Many fans talk as if it was the best Pokémon game ever made, but in my experience, it gets boring pretty quickly. Catching the same Pokémon over and over again is just simply not fun for me, even as a player that loves catching Pokémon. I also thought that the Hisui region was too bland and empty, which ironically, isn't much different to Sinnoh in my opinion, the land that it is a past version of. lol The game also has no breeding system or competitive scene, which was disappointing to me.
My least favorite Pokémon games on the Switch are those in the Pokémon Let's Go series. I actually picked up the Pikachu version because I wanted to give Pikachu a chance to make up for boxing it all the time in Pokémon Yellow, but the game itself just turned out to be a huge disappointment. I couldn't battle wild Pokémon in the same way as previous games. When playing with the Switch docked to the TV, I had to use one joycon, which was horrible to me, and I hated the catching system. Pokémon on consoles should never be like Pokémon GO. To add insult to injury, the game was extremely easy, which is already bad enough for a Pokémon game, which is known for being easy enough. It's a shame too because Pokémon Let's Go had so many cool features such as being able to ride certain Pokémon and other things, but they were overshadowed by everything else that they did horribly.
Lastly, I do own New Pokémon Snap, but believe it or not, it's still in the plastic. I've just been focused so much on breeding and battling in Sword and trying to finish my Shield play-through that I just haven't opened it yet. Maybe I should get too it soon because the game definitely looks beautiful.