Also, I would call Neurotic a positive trait, in spite of its connotations.
Neurotic is definitely a good trait. You can freak out and you'll be immune to stress for 8 hours. If you freak out every day right before going to work, you can work hard all day without getting stressed, which can lead to more raises and faster promotions. It's also a good trait for writers to keep from getting stressed.
Neurotic sims also get frequent wishes for things like cleaning dishes, making the bed, washing hands, brushing teeth, etc. These wishes may not be worth a lot of points, but they come very often so the points will add up. I try to keep one wish slot open at all times so I'll be ready when these wishes come up.