Possible Clues:

• They have an exaggerated sense of their own importance
• Vain sorts
• They have big heads
• Ones with "a case of mistaken nonentity": Barbara Stanwyck
• Legends in their own minds
• The selfish make the street sit up under Eastern attempt
• Trip takers of a sort
• Deflation targets?
• Conceited and self-centered people
• Their priority is number one