This longitudinal study examined factors that can contribute to subjective well-being of primary caregivers to family members with mental illness. Personality constructs, coping behaviours and caregiving burden were explored. The personality constructs included optimism, goal adjustment capacities and unmitigated communion. It was found that while high levels of burden compromise subjective well-being, certain personality traits and coping behaviors can mitigate the negative effects of burden. For example, optimism was found to predict better well-being, especially when burden was not high;...