This study explored the relationship between personality traits—including temperament—and adults' enjoyment of singing, investigating how these traits predict individual differences in singing enjoyment and highlighting the psychological basis of musical engagement. The participants were 270 Chinese adults aged between 18 and 65 years, consisting of 135 males and 135 females, with a mean age of 41.14 years (SD = 12.94). We measured temperamental tendencies related to behavioral activation and inhibition, broader personality traits based on the Big Five model, and the degree to which participants enjoy singing. In addition, participants provided self-assessments of their singing ability, which were included as a covariate in the analysis. Data were collected online following approval from the Institutional Review Board (IRB), and all procedures, including obtaining informed consent, were conducted in accordance with ethical guidelines. In the correlation analysis, neurotic tendencies were not significantly associated with enjoyment of singing, whereas extraversion, openness, conscientiousness, and agreeableness showed positive correlations. BIS was unrelated to enjoyment of singing, while the BAS subdimensions of reward sensitivity, drive, and fun seeking demonstrated negative correlations. The Big Five personality traits accounted for approximately 29.0% of the variance in enjoyment of singing, and they accounted for an additional 14.2% beyond self-reported singing ability. Meanwhile, BAS and BIS were found to account for only about 6.2% of the variance in enjoyment of singing. In the stepwise regression analysis, conscientiousness, openness, fun seeking, and agreeableness emerged as significant predictors, with conscientiousness being the most prominent predictor of singing enjoyment, accounting for 19.6% of its variance. These findings suggest that personality and temperament significantly influence enjoyment of singing, thereby advancing knowledge of the psychological foundations of musical participation.