I usually play with mods unless I'm playing a challenge that requires I not use them, in which case I remove them. I find certain mods very, very useful. Master Controller is by far my favorite. When I want to change something about the way EA has presented the game, almost anything I might want changed can be done with Master Controller. There are a few exceptions. I enjoy certain features of Woohooer, like being able to overstuff households and the availability of a matchmaker. I only use a handful of mods, though, because when I put a bunch in, my game actually went slower. What the mods were doing was hurting while it was helping, if that makes sense. I removed the ones I needed less. I also don't like to use too many because I could never possibly remember what all the settings are and what they do. Even with the mods I have, I change only a handful of options and even those I don't change all the time. Lastly, I'm not someone who feels the need to control everything in my game. That's not what makes the game enjoyable to me. I want it to be unpredictable and to struggle somewhat to send things in the direction I desire. There are mods for virtually everything, but if I used all of them, I don't think the game would be the same one I enjoy.