Miyoo Flip v2
This is my favourite design but I've already had to fix the hinge once... and this is the revised version to improve on the original! Also the thumbsticks are awful so I avoid using them whenever I can.
Gameplay wise it runs up to PX1/N64 great but then stuff like Dreamcast and PSP are "playable" but not ideal. That's to be expected though.
Anbernic RG35XXH
This was my second handheld and there is a definite theme going on here :D I mostly played GBA games on this at first but because the tumbsticks are far better than the Flip it is now the most used console. It also plays up to PS1/N64 games but, last time I tried, anything more does run but is mostly unplayable.