On PS4 I'm going with Spiderman (looked legit fun) and Monster Hunter World (wish the portable version was localized though..)
On 3DS Samus Returns. Here, pretty much like with Spiderman, I wished I was playing the game while the trailer / demo went on.
On Switch, too many games to count. I will limit myself to 1 per month. Mario, Splatoon, Rabbids, one among NBA and FIFA 2018, Rocket League (man portability was the only thing missing from the PS4 version), Yoshi, Kirby and Xenoblade 2. Oh and Pokken.