My favorite console would be Playstaion 1 (yeah, I can say PS2 too because it can play PS1 games bu nostalgia plays a big role in why I love MY playstation.)
If I can choose handhelds it would be PSP in it's time (I only played my friend PSP for a while, and that made me really want my own, sadly the device's life ended before I could.)
Now, 3DS is my current favorite, which will most likely be beaten by Switch when I get one, as long as its future turns as I imagine. (and game freaks don't mess up the future of Pokemon!!)