I don't believe that most of the "positive" personality traits are just that - positive without a downside. OTOH, I believe many of the "bad" personality traits have a bright side as well - well, perhaps with the exception of "murderous". Murderous is a personality trait, right? No?
I'm gonna announce an exercise.
1) Each post, write 2 original words where 1 describes a good personal quality, and 1 that describes a bad one. Example: +honest, -greedy
2) Comment on the previous posters words - 1 from the "good" category and 1 from the "bad". Find bad in the good, and find good in the bad. For example, honest=self-righteous, greedy=economical.