Just handhelds, generally.
I have 2 modded DMG Game Boys with EZFlash Jr's, planning on modding my OG GBA and maybe my GBC as well.
It's not convenient for me to play home console games on original hardware, I don't have the space to keep them all hooked up. I also don't have them modded for high quality video output. But that's not a problem with handhelds.
DS/3DS work best on original hardware, since they're designed for touchscreen and dual screens. I never liked playing those in emulator, even though they look much better in emulator these days with the option of increasing render resolution, they look weird and they don't control right.
GB/GBC just look better on a smaller screen. They look very blocky on a larger screen, and they don't fill the screen. Not that I mind that too much, sometimes I'll play on an emulator if I can't be bothered to grab a Game Boy.
GBA kinda looks fine on a larger screen and mostly fills up the screen, so I don't have any preference. I mostly played GBA on emulators growing up, other than Pokemon R/S, simply out of necessity since I didn't own many GBA games and flashcarts were unobtainium.
8-bit/16-bit home consoles work just as well on original hardware (with RGB output) and emulator, but since many of the games don't have saving and some don't even have a password system, being able to use savestates in an emulator is a huge pro, since I don't usually play through the entire game in one sitting, so I prefer playing them on emulator.
3D home consoles are best played on emulator (except for the ones that don't yet have good emulators). That includes the Switch, which benefits more than most other consoles due to how poorly some games run on real hardware. Increased render resolution by itself only makes a small difference on N64 and PSX, but makes a big difference on GC and Wii, and texture packs (for the games that have them) can make a big difference. N64 is also the hardest to get good quality video output from, and the analog sticks are problematic, so getting the most out of original hardware is a pain and it just looks bad on modern TVs otherwise.
I do miss playing console games on original hardware, but I'm not willing to live with all the drawbacks and I simply don't have the space. Maybe eventually I'll get a MiSTer MultiSystem, seems like the closest thing to real hardware without all the drawbacks. They aren't cheap, though. And you can't play real cartridges on it. Not something I would likely do often, but still, that's part of the charm of real hardware, so not having the option would suck. I really want a MiSTer with real cartridge slots and controller ports for at least SNES and N64 so I could use my original carts and controllers. I could always get adapters or modern wireless versions of the controllers, but that's an added cost, and there still isn't a good wireless recreation of the N64 controller other than the NSO one which was immediately bought out by scalpers and is now unobtainium.