This paper tests a central implication of the theory of equalizing differences, that workers sort into jobs with different attributes based on their preferences. We present evidence from four new time-use data sets for the United States and France suggesting that workers who are more gregarious, as revealed by their behavior when they are not working, tend to be employed in jobs that involve more social interactions. We also find that workers report substantially higher levels of job satisfaction and net affect while at work if their jobs entail frequent interactions with coworkers and other desirable working conditions. (Contains 7 tables, 1 figure and 20 footnotes.)