So, I'll start. I have 3 devices that I'd say are tied for best

First, my n3ds xl. Beautiful handheld, clamshell, just a nice piece of hardware. If the cstick didn't suck itd be the sole winner. My 3ds has served me very well

I also like my rp4 pro, just a great all round emulation machine. And a functional second analog stick, its almost like analog sticks are meant to be sticks and not pencil top erasers

I also like my ambernic sp, got it recently. Looks cool. And clamshell so yippee

As for the worst, I have a few:

Mandatory jab at the switch. Not awful but cmon, the controls suck

The leapster explorer. Shitty dpad. Insane power consumption, it s afun gimmick, jut kinda useless.

Then I had this little system from lexibook, the "compact cyber arcade" or something. Was silver and white, appeared to be 16 bit. Really shit controls. Buttons weren't even labeled. It also just randomly died after about a decade, but I can't fault it for that I guess.

I also hate tiger handhelds with a passion. Like ignoring the awful game, the controls just SUCK I didn't even pay for the one I do have and I still feel scammed