Zest is practically a happy trait by definition. “We describe people with this strength as vigorous and energetic, bright-eyed and bushy-tailed, bouncy and perky, peppy and high on life,
"living life as an adventure; feeling alive and activated"
People with zest broadcast an authentic attunement and engagement with life. Approaching life this way improves their performance, as well as the many others they come in contact with.
In other words their batteries are always full, and if yours are low they don't mind you sharing some juice.
“Vitality describes a dynamic aspect of well-being marked by the subjective experience of energy and aliveness (R. M. Ryan & Frederick, 1997). As an indicator of organismic wellness, vitality is directly and interactively related to both psychological and somatic factors. At the somatic level, vitality is linked to good physical health and bodily functioning, as well as freedom from fatigue and illness. At the psychological level, vitality reflects experiences of volition, effectance, and integration of the self at both intrapersonal and interpersonal levels. Psychological tensions, conflicts, and stressors detract from experienced vitality.”
Excerpt From: Christopher Peterson & Martin E. P. Seligman. “Character Strengths and Virtues: A Handbook and Classification.”