Things like never visit anyone, because it's always some kind of holiday, and they don't believe in them. Except anniversaries.
They won't come to weddings, even when it's a sibling, only receptions, unless the reception is in a catholic churches hall, then they wont come to that either.
No Thanksgiving, no New Years, no 4th of July, even benign holidays they pass on.
They constantly try to preach their version of the bible....now it's pretty hypocritical that most of my (Catholic) family gets annoyed by this, but in the end it is pretty annoying.
The door knockers who come to my house....will often "name drop" thinking that will get them inside. It never does. I suspect my sister/family has told them to visit, seeing as they know as soon as I answer the door that I'm _____'s brother-in law.
They are 10 times more self righteous than anyone else I know.
The list is actually much deeper, but that would involve more personal stuff I'm not going to mention here.