For me it's Diablo II. Granted I've played my fair share of D2 since launch, and also recently on a private server with a comrade from hexbear, but I still feel like years later the game didn't grab me as much as D1 did.
Granted I don't hate D2, but for a game that I keep coming back to, D1 takes the prize.
maybe not "came to", i disliked the old republic when they said it would be an mmo and destroyed all hope of a third single player bioware rpg
does new vegas -> fallout 4 count?