It's a predominantly negative word in China. If you describe someone as 好斗的, you mean that person is invasive, given to argue with others and always want to win, beat. But you also can use it to describe a person who has great ambitious，is aspirant and very eager to achieve. That makes you admiring. To some people like warriors, this is a positive word. In most case, don't use this word to give a positive meaning. The fist glance of this word is negative.

一个好斗的人通常会引起很多无谓的争斗,所以是不太好的.

Yep, there's a little bit derogatory sense in it. It symbols a person tend to solve problems in violent ways.

yes,means:like fight,sb with violent-tempered!

是的，中国文化崇尚平和，所以“好斗”常含贬义。