Bariatric surgery is an effective obesity treatment, yet its success is often linked to psychological health. This study explores the impact of personality patterns and emotion regulation on the daily lives of bariatric surgery patients, emphasizing the importance of psychosocial factors post-surgery. Using a concurrent mixed-methods design, 95 participants completed quantitative surveys on personality, emotion dysregulation, and quality of life, while in-depth interviews with 18 participants provided qualitative insights. Integrated findings showed that personality patterns significantly influence biopsychosocial quality of life. Qualitative data indicated improvements in emotional coping and social relationships, though quantitative data did not find a direct link between emotion regulation difficulties and quality of life. Positive personality traits correlated with enhanced social engagement and body image; however, fears of weight regain and dependency on external control persisted. The study highlights the need for integrated mental health support focused on emotional resilience and personalized care to promote long-term well-being and adaptation after bariatric surgery.