Here are two of mine:
I think the tagging "label" system they currently have for organizing games is way better than folders used in 3DS and Wii U. For the same reason Google went with the label system in Gmail when they developed it (and it was considered very innovative at the time). Games can be tagged multiple times or not at all, but with folders they can only be grouped once. It also lets you sort them other ways (ABC, playtime, last played, etc.) while not having any weird UI confusion. I still find sorting and viewing my whole collection useful, such as when I have a guest over and want them to pick a game out of my entire library or just to show them what games I have. I only wish you could jump to your tags right from the main menu, but I think they did this to prevent you from skipping over and forgetting about games you've not tagged. Although they could have had a link to "all software" or "untagged titles" in the label menu too. But right now it's still pretty easy to get to with just three inputs. It IS a bit awkward having to press left to get to all software I will admit. That could have had a simple button shortcut too. I was actually always struggling with my large collection of 3DS games because I would forget what folder I put a title in, accidentally moved it in the wrong folder, and hated that you couldn't sort your games within or outside of the folders. It was completely a manual process no matter which way you went about it, just like if you had a shelf of physical titles. No way to view your library in ABC order, etc. and no library search function either. Something which I think the Switch should have too by the way. Overall, with my frustrations with the completely manual 3DS organization system, I was happy with how they went about it on Switch but still see other people criticize it all of the time. So I think my opinion isn't popular.
I like having the old games on the streaming service and even think there's benefits to gamers from them releasing them piecemeal. I'd probably never pay for a lot of these games again because it's so easy to emulate on many different platforms (phone, pc, modded consoles), but IT IS nice to have a library of old games available on the switch, and costs me 8 dollars a year with family plan (the full expansion price is too much and I'd never pay it). It even has led me to discovering "new to me" games I would have never played or bought from Nintendo's past. I think releasing them in chunks can be a fun community thing too because after they dump a batch on us, I notice lots of people online and in my personal life are playing them again as Nintendo has shone the spotlight on them, so to speak, which makes them the center of discussions; and I love classic game discussions! It was a good way to build hype and awareness for the Metroid franchise when they released the GBA titles on Switch and were pushing the new Dread and Prime Remastered games around the sams time, bringing more awareness of these games so that when Prime 4 gets here people will be very familiar with a series that isn't as popular as Mario or Zelda. It's nice having a big library of old games ready to go when you want to switch it up and play something different but don't want to drop more money and download a new game you don't know if you'll like or not. The streaming makes it low stakes. The only thing that makes the NSO classic games service fall short for me is that we won't see a lot of great games on there due to IP publishing reasons, so lots of classic games strongly tied with old systems' identities are going to be left out as their IP owner chooses to keep them off the service and opt for a eshop release or remake instead.
One thing I also particularly enjoy on NSO is the multiplayer option to play single player games with a group of friends online and virtually passing the controller between players. It's almost as good as being in the same room like when we were kids. My old friend and I nearly beat Mario 64 together online while we were talking on the phoned living on different coasts, and then decided to play some mario tennis 64; for which we have a rivalry. He was feeling very lonely because his wife had died recently and the online multiplayer feature really brightened up both of our days that afternoon as we (sometimes struggling to!) remembered how to get 120 stars.
What are some opinions you hold about the Switch that are unpopular? Anything at all! Mine were good things most people criticize, but maybe you have a criticism of something everybody else praises about the console. Let's hear it! I thought this could breed some fun discussions.