Anything you do with a playful, mischievous glint in your eye is done with waggishness. This characteristic of snappy humor is vital to practical jokers and class clowns.
Waggishness is a common trait of sitcom characters and teasing uncles — it's a good-humored playfulness that's just a tiny bit snarky or sharp. Though this noun is rarely used today, it's still a great way to describe someone's specific brand of humor. It comes from the old-fashioned noun wag, "person fond of making jokes."