There have been stereotypes floating around on combat ability throughout the ages that remain to this very day. These stereotypes are generally based on appearance, though there a lot of different appearance factors people take into consideration. In terms of area a person is from, usually people judge that the ‘harder’ the area, the better their combat ability.
In addition, attitude plays a big role into one’s perception of combat ability, as well as confidence. Unfortunately, while aggression and experience does help, these other factors do not really increase a person’s skill or technique. An existing stereotype does not mean it will automatically apply to the person.