In order to assess the relationship between personality and social network usage,wefirst sought to identify reliable structures for each of the variables through the use of exploratory and confirmatory factor analysis. Next, using the identified structures, we proceeded to build regression models between the personality variables and Facebook and Twitter use in a stepwise fashion. Finally, we examined whether there were differences in personality based on which SNS participants preferred to use. All analyses were conducted using Mplus 6.0 (Muthen & Muthen, 2010) or SPSS 16. 3.1. Social network use Participants average social network usage ranged from 0.25 to 25 h per week (M = 3.24, SD = 3.20). The covariance between time spent using SNS and each of the personality variables was calculated using the Pearson’s product-moment correlation coefficient (two-tailed). The only significant correlation was due to Conscientiousness (r = .14, p < 0.05). The majority of participants reported accessing social network sites from home (n = 244, 80%), whilst some predominantly accessed SNS from work (n = 23, 13%). Further, the majority of participants accessed SNS using a laptop computer (n = 198, 66%) as opposed to desktop computers (n = 61, 20%) and mobile devices (n = 41, 14%).