I might buy a super lite switch model, like a switch micro. Playing mostly in handheld mode but think the Lite still is to big to be brought with me with ease making the better screen on the OLED-model my preferred switch.
I have bought two switches. The original and the OLED. Gave the old one to my nephew.
Bought 4 DS, the original and 3 Lite models. Still have not used the latest model I bought, keep it if the one I still use will break.
Bought two 3DS as well, upgraded to the New 3DS in hopes that I would like the 3D effect more with the tracking upgrade. I think it is the best way to play in 3D but I still almost never did.
I have however never owned a PSP or Vita. always thought the tech was cool and was low key jelly of my friends who had it back when it was somewhat important to me still to be cool, or at least not being seen as the biggest dork around - something I have no hang-ups around anymore.