Old School Runescape for me. Spent my childhood grinding for levels and made tons of happy memories. I'd log in once in a while for the nostalgia but my old friends moved on to cooler games and in game friends have left it as well.
Why overwatch? Lol it’s not that old xDIt was Overwatch. I spent a lot of time playing them maybe hundreds of hours but still you can play it hours on end and feel no fatigue. Also I like that it is possible and safe to use the help from other gamers (I prefer these ones) and not to be afraid that you will be banned or there will be any data leak.