Previous research has concentrated exclusively on the association between the frequency of joint family activities (JFA) and adolescent problem behaviours. In this study, multiple linear regressions based on a national sample of 3467 13– to 16–year-olds in Switzerland revealed that JFA enjoyment rather than JFA frequency is consistently related to low adolescent substance use and violence. By choosing JFA that their children enjoy, parents might provide opportunities for disclosure, strengthen family bonds and reduce the likelihood of adolescent problem behaviours. In terms of prevention, a shift in focus towards the quality rather than the quantity of JFA could prove more effective.