Kicking the cigarette habit reveals some suprising new benefits beyond cleaner lungs. Snuffing out smoking may also improve your personality, curbing traits such as neuroticism and impulsivity, according to new research.

Study lead author Andrew Littlefield of the University of Missouri in the US found that people who are more impulsive, more emotionally negative, and more anxious are also more likely to smoke. Researchers compared people, ages 18 to 35, who smoked with those who had quit smoking.