The PS3 and the 3DS for me.
The PS3 was just awesome, PS1 discs could be read on them, it could rip CDs into mp3 files (Gran Turismo 5/6 made use of that where you can use your own music in-game), of course it was a brilliant DVD/BluRay player and it had free online multiplayer. My PS3 is succumbing to GPU issues currently which is a shame, but it was brilliant when it worked. Total multimedia powerhouse.
The 3DS was great as well, there were so many fun features crammed into that little thing. Streetpass and Spotpass were great and made the 3DS feel a lot more sociable, like it was encouraging you to interact with the world (which is pretty rare and an aspect that's missing these recent years). I don't know if Nintendo will ever bring back the DS line, they should in my opinion; there's nothing else like it before or since. I guess the initial premise of the Switch was to be a sort of "social console" with its tablet mode and removable controllers but it feels like Nintendo has abandoned that aspect of the Switch after a few years.