Hi there! I’m sorry it took me so long to get back to you. 😦 I answered this way back when. 🙂 The traits system I use isn’t a mod, it’s a list of TS3 traits that I just manually roll for my Sims using an online number randomizer. 🙂 Ledesia’s original post pretty much explains everything you need to know! (I’m very bad at keeping up with it, though. I always forget to roll traits for new Sims and babies, especially when my households keep having quadruplets all at once! XD)