Final answer:
John F. Kennedy is remembered for his youthful glamour, inspirational hope for a better future, and charismatic leadership. His outward vitality and optimism, alongside his focus on a new domestic and foreign agenda defined as the 'New Frontier', left a significant imprint despite his short time in office and few tangible accomplishments.
Step-by-step explanation:
The characteristics that describe John F. Kennedy and his administration include youthful glamour, a sense of optimism, and the ability to inspire hope and belief in a better future. He was one of the youngest presidents and brought with him a sense of energy and charisma to the White House. Kennedy's focus on the New Frontier emphasized domestic programs to aid the poor and protect civil rights, but his administration also focused on foreign policy challenges such as the Cuban Missile Crisis and the early stages of the Vietnam War. Despite a short tenure and few legislative victories, his eloquent inaugural address and his family's image contributed to a lasting legacy. He illustrated the transformation of American society that began to quicken in the 1960s with more active participation from different ethnic groups and the youth. Kennedy's call to action in his inaugural address - to ask what you can do for your country - encouraged many Americans to actively contribute to the nation's future. Kennedy's tragic assassination left many to wonder what might have been, both for his presidency and for the nation.