Obama has been a dignified, class act throughout his terms. He treats the office of the Presidency with the respect and dignity it demands. For one thing, he's never called anyone a name (Pig, Miss Housekeeping, fat slob, criminal, crooked, etc.). For another, he's never bragged about molesting people. For another, he never actually did molest anyone. For another, he's never claimed to be "the best!" or "everyone says I'm the best!" or "the smartest," or "the one who will make the most jobs of anyone else..there will be so many jobs that people will say stop stop we have so many jobs!" and other egomaniac statements.
He has a great sense of humor and tells jokes pretty well. He treats everyone respectfully, although he will jab them at the White House Conference, where the tradition is for the sitting President to tell jokes. Michelle Obama is a class act, as well. Their daughters have behaved almost perfectly since moving into the White House (remember that the Bush girls had gotten drunk, one stuck her tongue out at the press, and other childish things...imagine what the public would've said if Obama's daughters had done such things).
He has also shown his temperament to be spot on for one in a position of high power. Cool, thoughtful, intelligent, seeking counsel and taking advice, decisive, calm, thick skinned (which all Presidents must be).
Watch the State of the Union address where, for the first time in the history of the nation, one of the supposedly dignified members of Congress yells out at him "YOU LIE!" Watch Obama's reaction. Then think about how Trump would have reacted.
