You aren't afraid to discuss your religious beliefs and you're also respectful of others who may or may not have differing beliefs. (Hi, I'm a Christian. I attend a very nice Lutheran church. And by the way, Merry Christmas and Happy Holidays to you! Much love!)
Knowing the risk, you brave the rowdy Christmas-Eve shoppers, charging ahead with your cash and fancy footwork like a rookie knight rushing his opponent in a Jousting tourney. It's truly amazing what acrobatic feats are performed for the most sought-after child's toy or shiny pair of designer pumps.
Your granny gives you adult underoos. Adult. Underoos. Hahahaha....awesome. You wear them with pride...regardless of your age. (Batgirl is my fave, though Spiderman is a close second!)
During a busy, stressful time at work, you put on your very best elf shoes and go to Starbucks, order very complicated holiday beverages (with an angry mob behind you) and deliver each yummy treat to each person (without asking for reimbursement). And remember to include the boss, because he (or she) deserves a treat, too. Aww, service with a smile!
Look. At. That! Mistletoe overhead. Cute guy (or gal) directly underneath. You go for a full-on, academy-award-level, take-my-breath-away-regardless-of-who's-in-the-room smooch. Bravo! Bravo!
You buy gift cards, food and/or blankets and personally distribute them to the homeless/less fortunate. That's not necessarily a confidence thing, but it is right kind to do so.
You visit the Mall Santa and have your picture taken with him. And knowing that you're probably on the naughty list again this year, you still boldly ask him what you reeeeeally want.
Your adult brain takes a sabbatical and your childlike wonder steers your ship. This potentially leads to decorating in a bright way that would make Clark Griswold proud, making "ugly" Christmas sweaters, throwing loud theme parties, making snow angels and having snowball fights, having high sugar (and super giggly) Christmas movie marathons, and the like.
You've reached the level of happiness with yourself that you don't care what others think of you and your life. So what if you put antlers and a puffy red nose on your vehicle? So it's silly. It's way cool and you know it.