I noticed an ("old") bug.
According to patch notes v11.0, the parameter MOOD and its effects were removed.
"v11.0
...
9. Removed the parameters STYLE and MOOD. Their role in communication, quality of work, sympathy of characters (as a result of voting) was also removed."
This is not correct.
1. The stat display for MOOD was removed but MOOD is still in the game.
2. You can see in notifications that some actions change mc's mood and if mc's mood reaches zero, mc will refuse to do actions until MOOD is above zero.
3. Furthermore MOOD still affects work quality :
Produced Lines of Code = (MOOD / 100) x Lines of Code (Skill, MOOD = 100).
So if mc does an action like reading a book which lowers mood by 10, the output when working afterwards is also lowered by 10% compared to the value for 100 MOOD. Watch a video about hacking (-30 mood) and work output is reduced by 30%.
There is a simple work around to avoid effects of reduced MOOD : Watch PORN. PORN at the PC restores +75 MOOD.