My family of origin was pretty well defined, generationally. So we never dropped the honorific. In fact, we called our parents' cousins Aunt and Uncle out of respect.
In Lucas's family there were so many nieces and nephews who were older than their aunts and uncles, the whole thing was really blurred it was kind of hard to figure out so just first names.
I always simply signed greeting cards with Aunt L & Uncle L, and the kids in that family learned to use the terms, so our 50 year old nephew calls us Aunt L and Uncle L.
My family was a little more southern and Lucas's a little more northern, too.
After I got into genealogy, we refer to the deceased
by their names, even my own parents. "Mom", "Dad", "Grandpa", "Grandma" just gets too confusing, whereas "Pauline", "Glenn", "Wallace", "Clara", makes it a lot clearer. The Daves and Johns are further defined because there are so many.