I don't often play PC games, obviously minecraft being my favourite here as it would be most people's, found myself playing a fair bit of Deep Rock Galactic again lately, it's fun, but I wouldn't say it was a favourite.
In terms of console (PS4), It would have to Grand Theft Auto 5 or the GTA franchise in general. They have always been my favourite games both single player and online. I would say in second it would be the Call of Duty franchise, but a lot of the recent games I wasn't too keen on. I played a lot of Blackout on Black Ops 4, and put a fair few hours in Modern Warfare (the recent one), but apart from that's it's been a while since I've enjoyed a good COD game.