Everytime I play the sims 3, I noticed my sims' mood steadily rising over time, even if there's no positive moodlet. After playing for 2 hours or more, my sims' mood state will be elated forever until I quit and load the game again. Even -200 moodlet from being on fire can't lower my sims' mood. This glitch is not applied to pets, however, and will disappear if I used resetsim cheat, but will appear again nonetheless.
I know this is a good thing, but it makes me feeling uncomfortable. I only use nraas mod. Is there any way to play without this glitch?