A pretty-faced do-nothing. Seriously, JFK did nothing on civil rights until he was absolutely forced to, got us into Vietnam, and accomplished almost nothing of note. Why he is so revered by the American public is beyond me.
Actually, it was Eisenhower under whom U.S. involvement in Vietnam begun. Kennedy merely maintained this relatively limited (as compared to the latter escalation) involvement during his Presidency.
As of the civil rights, you're right (he also has a cowardly record on the issue as Senator).
However, I can't agree he accomplished "almost nothing of note". As Oakvale noted above, he was willing to stand up to the military establishment... and had the military establishment got their way during the Cuban Missile Crisis, consequences would have been utterly, utterly dreadful.
Aside everything else, his handling of the 1962 crisis was hell of an accomplishment.