How about:
Absent Minded trait. I think a previous Sim game had this one.
Analysis Paralysis Trait: A sim that overthinks on everything. So they try too hard on their homework and end up doing worse on it. Or they cause holdups in games like Don't Wake the Llama, and other sims playing end up with negative moodlets like becoming bored.
Know-it-All trait: A sim that shares incorrect knowledge to other sims, and gains confidence in their wrong answers.
Oblivious Trait: A sim that does not pay attention to their surroundings. Example: If there is a fire, they don't realize its happening.