For me it's definitely the Nintendo Switch.
It has revived my passion for gaming in a way I couldn't even imagine. I had a PS4 and Xbox One this gen. I sold my PS4 2017 to my brother and bought a Switch at launch instead and what should I say. Gone were the days of gigantic updates every time I boot up the system. I found a new passion for indies, especially Super Giant Games and even realized that I hate achievements and trophies. So I finally turned off these notifications on my Xbox and even had more fun on that console once again. But I'm also curious for games I missed since then on Playstation. Games like Ghost of Tsushima or Horizon Zero Dawn. Because of this I pre ordered a PS5 recently.