I'll start. A colleague would be politely suggesting designs or changes, but rolling with the punches when people disagreed. They were always proven right eventually, and it was usually because someone wandered into a module they had written and loved it.They changed a lot about how I worked, and by far their main characteristics were patience with us and a sort of completeness to whatever they wrote. It just arrived, maybe with one small adjustment or bugfix, bug never with a rearchitecture or ...