I'm not Catholic. I'm not even religious. But various saints did exist and did do good while on this earth. Here are the three I identify with.
Saint Christopher is, among other things, the patron saint of travelers, particularly those traveling long distances. I have always enjoyed travel, so this saint fits. He's also the patron saint of Brunswick, Germany. I was born in Brunswick, Georgia.
Maximilian Maria Kolbe is the patron saint of amateur radio operators and Esperanto speakers. I'm KC4VJO and, to some degree, mi parolas esperanton. Since radio is involved here it goes without saying he's a more recent saint. He was a Polish priest who volunteered to die in place of a condemned Jewish man at Auschwitz-Birkenau.
Saint Patrick is the patron saint of engineers. There's a large cathedral named for him in Dublin. He's known for other things too, but for me, he's the patron saint of engineers.