It was a verry merry berry short answer, he didn't elaborate anything, he just said which trait to increase and which trait to decrease.
I think that some people are just more aggressive than others by nature, they can't help a particular personality tendency, but that doesn't mean they will harm or want to harm others.
The trait that I would want to decrease is probably apathy. Increase, I am not sure, perhaps flexibility.
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Drain and plane and grain and blain your brain, and then again,
Propane and butane out of the gas main, your blain shall sustain!