My mother used to be one of Pres. McKay’s secretary’s, and she can tell some fascinating stories of how the First Presdency at the time interacted. My wife and I are close to opposite personalities in many ways - which makes us perfect for each other as we try to become whole and complete as one. I also have commented actively on various group blogs in the Bloggernacle (the umbrella term for Mormon-themed blogs) and been intrigued by the group dynamics that keep such groups generally more civil than most other sites I've visited.
I view unity based on these experiences, but also based on the Sermon on the Mount - where “perfect” is defined as “complete” or “whole” - not as mistake free. In all seriousness, I believe there is an inherent conflict in the way that too many members view unity as an ideal. I prefer to think of it in terms that I think are taught in the Gospels and that formed the foundation of Joseph Smith’s efforts - by talking of communal unity [“community”] (a societal completeness and wholeness of unique but united individuals) as opposed to the “sameness” of most worldly definitions.