What personality trait reflects a dispositional tendency to experience hostility and annoyance?

The personality trait that reflects a dispositional tendency to experience hostility and annoyance is negative affectivity. This trait is characterized by a general disposition to experience negative emotions, such as anxiety, depression, and irritability. Individuals high in negative affectivity are more likely to perceive their environment and interactions through a lens of negativity, leading them to experience feelings of hostility, frustration, and annoyance more frequently than those with lower levels of this trait.

In contrast, positive affectivity refers to the tendency to experience positive emotions and is not related to hostility and annoyance. Extraversion is associated with sociability, assertiveness, and positive emotionality, again lacking the connotations of hostility. Differential reactivity could imply varying responses to emotional stimuli but does not specifically align with the chronic disposition to experience negativity and hostility like negative affectivity does. Thus, it is clear that negative affectivity is the most fitting answer for the characteristic described in the question.