To quote French author François Mauriac, ‘Tell me what you read and I'll tell you who your are' is true enough, but I'd know you better if you told me what you reread.
If a person who is content with his life meets someone who makes everything just a little bit more challenging, who both fits and doesn't fit into his life and his routine, to quote Guy Fieri, it is On Like Donkey Kong: swing the rope, jump the barrel, and save the princess.