There are various synonyms for the phrase "more smiling" that can truly promote positive vibes and affect a person's overall disposition. One of the synonyms would be happy-go-lucky, which implies a carefree and optimistic state of mind. Another synonym is cheerful, which pertains to a bright and lively outlook towards life. Also, one could consider using the word buoyant, which brings to mind a bounding and light-hearted demeanor. Additionally, jolly and genial are synonyms for "more smiling" that capture a good-natured and amiable attitude. Whatever synonym is chosen, it is important to remember that genuine and frequent smiling can have a profound impact on a person's well-being.