Possible Clues:

• Valedictorian's lone blemish?
• First-class aisle seat on many planes
• Certain first-floor apartment
• Seat near the front of a plane
• First floor apartment number
• Ground-floor apartment, perhaps
• Valedictorian's disappointment?
• Apartment next to a super, maybe
• First-class aisle seat on most planes
• First-floor apartment, perhaps