乐观 optimistic;

悲观 pessimistic;

内向 introverted;

外向extroverted;

自信self-confident;

豁达open-minded;

幽默 humorous;

忠诚loyal;

谨慎cautious;

耿直honest ;

机智quick-witted;

务实pragmatic;

博学 learned/erudite;

感性emotional;

理性 rational;