Nearly 1500 hours in Team Fortress 2.
Ever since that pretty abysmal Meet Your Match update, a pretty bad experience with competitive TF2 that left a permanent taste in my mouth, and the fact that Overwatch exists, I highly doubt I'm touching that game ever again.
"Just for comparison Uncharted 4 was 20x bigger than Splatoon 2. This shows the huge difference between Sony's first-party games and Nintendo's first-party games."