Our cat Dixie has a very light purr and it takes a lot of loving to get her purr motor going. Her companion Noodle will wake you up with her purring. Dixie was found in a trailer lot as a kitten and could fit into the palm of your hand. She was skin and bones. She's always been very reserved, hiding when anyone she doesn't know enters the house. Noodle is her complete opposite, always under your feet running around the house. Maybe it has something to do with their individual personalities, I suppose.