In my lifetime it is hard for me to pick the best president unless given specifics as a guide....I like and favor Angeline's guidelines and choices.
What comes to mind with me:
FDR brought us out of the depression, abolished Prohibition, started Social Security, led us to defeat our foes in WWII...What we have most to fear is fear itself.
Truman was give em hell Harry, told it like it is, got shot at more often in Washington (y'all remember), and had a tough decision firing MacArthur & dropping the bomb.
"I Like Ike" was a button I wore in those days.
Admired JFK and his family. Did some crying over his demise, agree mostly with the Warren commission.
Did a lot of up/down with "Tricky ****".
LBJ was from Texas and really had a good heart for the down and trodden.
Ford, I own Ford vehicles. He survived his accidents.
Carter, I liked peanuts, but always thought of him as too soft to be the President. Too bad he was one of the most who got a lot of press about 'Billy', although Billy Beer was not that bad of taste.
Reagan, scared the hell out of Iran. I liked his wearing of cowboy boots.
Clinton, if only he didn't go on TV and say "I never had....
GWB Sr. my hero, but should have gone in and gotten Saddam at the time.
GWB Jr. Ok, and gave tough warning to the world of terrorist and those who harbour...remember. Not that all full of joy with the Republican administration this go around, but will vote for GWB again as compared to record of lies & military service of his opponent.
My post may be a little off track, but can't really pick a best President.