I enjoy many genres of games but I think "competitive online" is a serious addiction for me lmao Any game with a "skill" I can learn and be better than others at? Very enjoyable!
War Thunder scratches that itch for me immensely. Before that was League of Legends and to a lesser extent Overwatch (ruined by the devs but got to diamond (70 from master) )
Beyond that definitely games like Total War or city builders. I really got sucked into Timberborn lately :0
There's so many....
Racing, shooting, MMORPG's ,certain roguelikes, RPG's , and more
I definitely love games that give you choices to affect the story.