For me it's gonna be CSGO, GTA V, and Overwatch.
CSGO I used to dump many hours into after high school, but the game slowly started to crash and burn for me after a while. Then my friend I went to High School with that I played with just came out of the blue as a gigantic asshat, got his main account banned because he decided to install an aimbot and wallhack software, and DDoS'd his entire team during a crucial part of a competitive match because he got bored of playing at Gold Nova levels and wanted to go back to pissing off silvers.
GTA V was an alright game, the plot wasn't bad, but it was far weaker compared to the previous games imo. I tried out the online part for five minutes before leaving and uninstalling the game from my hard drive because of all the cheating 12 year olds screaming in the mic.
I never played Overwatch, but the day they announced it all the way back in 2014, I already knew "this game is gonna be hot fucking shit". All my friends begged me to buy it and play it with them, so I just dumped another 600 hours into TF2 just to spite them. Now nearly 3 years later, my friends begging me to play Overwatch with them won't even touch the game with a 10 mile long pole.