Unlike other Fraggles, Boober does not like fun and games and spends most of his time worrying about doom and disease. When he's not worrying about himself, he's busy warning others. He is easily frightened and suffers from a variety of phobias like a fear of heights (as seen in "Sir Hubris and the Gorgs" when Boober was at the bottom of the five Fraggles' Sir Hubris disguise). Because of his fears, he is very knowledgeable about health and superstition. He has a lucky charm for just about anything -- often multiples.