World of warcraft. I'd been playing the games since warcraft 1. My parents wouldn't pay for my subscription so had to wait years to get it after release. 100% worth it. Amazing game back in the day.
Diablo 3 and 4. 3 was kinda worth it. 4 not so much.
StarCraft2 and hell yeah. Loved it.
Skyrim, again definitely.
Fallout 4. Despite some things lacking I thought it was awesome.
I was playing Guild Wars back in the days and I remember trying the free trial of WoW. At the end of it, I decided against getting a subscription, knowing how many hours I'd sink in the game. Truely a masterpiece.