1-Gamecube. It's so delightful to look at and the small size is so convenient. My favorite color is the classic Indigo.
2-Switch OLED. I love the way the screen looks, the big fat stand on the back, and the white joy cons are my favorite pair I own.
3- PS1. I like this design quite a lot. It's small and compact yet doesn't look or feel like a compromised or gimped machine.
Worst-N64. I hate the way this console looks. The little circular "feet" at the front annoy me and the giant gaping hole in the back from when it doesn't have its power brick plugged in looks ugly--it's how I imagine a human would look if they had the front 30% of the face chopped off.