For me it was Terraria, Satisfactory, Tetris Effect Master Mode, Minecraft with Mekanism mod & CSGO / CS2 (almost 2000 hours in CS alone).
Edit: There are so many answers that I might only reply if I have something interesting to say. I will read all of your answers though. 🙂
Original World of Warcraft.
I put years into that game. Then I started a family and I just had to quit.
If my gf (now wife) played we’d probably never get anything done.
I played for maybe 4 years… With my GF.
We’d play together for hours nearly every day.
I would play “a bit” before work and end up an hour late. This happened often and we just quit cold turkey. Ended up MMO hopping for like 12 years. Now we don’t do MMOs.