When do you decided, "It's time to stop for the day."?

[SexyTA]

I only play 5 competitive queue games a day. Usually I can tell after the first game how the whole session is going to go. Then I'll decide if it's a good idea to play more or stop for the day. If I'm having a bad day IRL, it definitely translates to my gameplay. I suppose I could call myself an "Emotional Gamer" if that makes sense, in the essence of my emotions control my quality of play. I'm not pouring my soul into the game, I'm just trying to not be 4-21.