morose
unhappy, annoyed, and unwilling to speak or smile
laid-back
relaxed in manner and character; not usually worried about other people's behaviour or things that need to be done
astute
able to understand a situation quickly and see how to take advantage of it
shrewd
having or based on a clear understanding and good judgment of a situation, resulting in an advantage
industrious
An industrious person works hard
brusque
quick and rude in manner or speech
impetuous
likely to do something suddenly, without considering the results of your actions
meticulous
very careful and with great attention to every detail
warm-hearted
kind and loving