1)They tend to be American exceptionalists: the idea that America is "special" with a mission (perhaps even a divine mission) to advance human civilization.
2) They tend to believe in the absolute, unquestioned moral superiority of American values, American culture and American foreign policy actions. We don't make mistakes, unless it was a mistake of not being "tough" enough.
3) They are never satisfied with how much money we spend on defense. Never. They always want more, more and more for the Pentagon. As late as 2003, PNAC was still whining that Bush's defense budget was "inadequate"
http://www.newamericancentury.org/defense-20030123.htm .
4) They tend to espouse a phony, pretend intellectualism that is blinded by ideological drivel and commands very little respect from the academic community.
5) They try to project a cheerful, optimistic tone to their arguments. They give war and militarism a happy face.
6) They have little use for international alliances, and little concern for international public opinion.
7) Historically, neoconservatives have espoused moderate positions on social issues (many original neo-cons were Democrats), but this tendency is being muted with time as more evangelical Christians are moving into the neoconservative camp.