The objective of this study is to determine the relationship of extraversion and introversion with the writing skills at graduate level. Five sub-domains of writing proficiency i.e. copying, reproducing, composition, guided writing and recombination were selected to explore their association with two major personality types i.e. extraversion and introversion. The study was correlational in design and 200 participants were selected by applying random sampling technique. The tools were made reliable before their administration. The results obtained from the study were hard to determine in establishing any significant relationship among extroverts and introverts with different writing components. However, overall writing proficiency and introversion had stronger correlation as compared to the extroverts and their writing abilities. It was also found that female learners had weak positive relationship with personality trait and writing proficiency, while male learners had strong correlation. The study concludes with the dire need of using variety of different instructional techniques during teaching writing components in English classes. So that, both introverts and extroverts many get academic benefits from different teaching strategies.