If you are known for your bonhomie, that’s a good thing. It means that you are a cheerful friendly sort of person. Keep it up.
Any French speaker will recognize that the noun bonhomie is related to bon homme — French for “good man.” However, a woman can exude a spirit of bonhomie as well, as long as she is cheery and kind. If you are looking to infuse a depressing setting with bonhomie, try cracking a joke or setting your beret at a rakish angle.