Uniqueness, pattern-seeking and perception. We tend to see
   ourselves, I believe, as unique individuals, not just how we
   think and feel but also how we look. How often do we say, "HE
   LOOKS JUST LIKE ME!" and when we do, it's a bit of a surprise.
   Yet, other people, depending on their pattern-compression
   algorithms in their brain, may see similarities from you to
   another person that you, and other people who see you
   frequently, might *not* see. "All old people look alike...
   except for my grandma". "All kids look the same, except for my
   nieces and nephews, who are unique". Well, a friend on G+,
   likened me to The Undertaker by the name of ebonygentleman. (He
   posts a lot of big black booty-pics. Not my thing but he reads
   what I write sometimes and has an intelligent, unique
   perspective, so i enjoy his friendship) Now, I would not have
   seen the similarity had he not pointed it out. Even THEN I was
   hung up on "How much I don't look like him" rather than "How
   much I do". But, put side by side, imagining a facial
   compression algorithm that folds irish/scottish/english-type
   faces all together into similar groupings, THEN I could see what
   he saw in the connection. So: we are all of different
   backgrounds here. Our backgrounds can color our perception of
   reality, especially with regards to other people. Do you see how
   I look the same as the Undertaker? Do you see how I look nothing
   like him? Or some combination of the two? Is it possible to
   categorize without loss of data? [the categorization problem is
   of ongoing interest to me, as pre-established buckets of any
   sort, are something I always found problematic staying
   within)[1]undertaker_kennethUdut

References

   Visible links
   1. http://icopiedyou.com/wp-content/uploads/2015/04/undertaker_kennethUdut.jpg