Etiquette for talking about former Presidents

If a president is deceased for a long time:

and is well known, his name is "George Washington" or "Abraham Lincoln"

and is not well known, his name is "Grover Cleveland, the guy who was president twice" or "John Quincy Adams, the 10th president"

If a president is deceased and served within your lifetime:

and was generally well liked, his name is "President Kennedy" or "JFK"

and was generally disliked, his name is "Richard Nixon"

If a president is deceased and was a war hero:

and was generally well liked, his name is "President Eisenhower" or "General Eisenhower"

there is no disliking a war hero president

If a president is still alive:

and he is generally well liked, his name is "Ronald Reagen"

and he is the father of the current president, his name is "President Bush's Father the other President"

and it is yet to be determined, his name is "President Ford" or "President Carter"

and he is generally disliked, it is just because you are jealous of "Bill"

If the president is deceased:

ummm.... say what?

If the president is alive:

and you respect him, address him as "President Carter"

and you don't respect him, it's just because you are jealous of "Bill"

and you don't remember his name, address him as "Mr President" or "Sir"

and he doesn't remember his name, call him "Ronnie"