Public Signs of Catholic Identity

I wonder if I can make a list of things that obviously mark you off as a Catholic.

1. Having a lot of kids, especially if you are under 30
2. Making the sign of the Cross in public, saying grace before meals
3. Abstaining from meat on Fridays. (hopefully the work of the English Bishops will influence others!)
4. Going to "Mass"
5. Wearing a Roman Collar

What else?

Conspicuously missing is anything to do with moral goodness or joy.

HMM