Catch Phrase: "Have mer-cy! "I'm there for ya babe" becomes one later on
Character Development: Initially, he is portrayed as a rebellious, music crazed biker who didn't seem to enjoy helping his family. As seasons progress, he is shown to be more family oriented (to the point of saying they are more important to him than music) and focused less on producing music and more on providing it like owning the Smash Club and running a radio station
Characterization Marches On: In the early seasons, Jesse was shown being a sports fan such as watching games, and playing football. In later seasons, he hates sports and is shown being uncoordinated.
Characterization Marches On: An early episode had Danny reluctantly cleaning the house when the boys' mothers descend upon them. The same Danny Tanner who in later episodes is shown cleaning his cleaning supplies.
Though he was known to be a neat freak when he was a child as well. His messiness at the beginning of the series could be attributed to depression over the recent death of his wife.
Momma's Boy: Implied a few times like when Danny said he kissed his parents and the floor when he returned from camp (which Joey promptly said was a day camp) and telling DJ his mom chose his drink till he was 21
The Artifact: Unlike Jesse (the actual uncle), he was just a good friend that agreed to move in to help Danny raise the girls. Over time, the girls had gotten old enough to take care of themselves and Rebecca also moved in after marrying Jesse.
Big Eater: Not to the extent that Steve is, but he's known for his appetite.
Karma Houdini: Big time. Even though the plot of Season 4's "Crimes and Michelle's Demeanor" involved Danny realizing he was letting her get away with too much. Lampshaded occasionally in the rest of the series. Although usually when Michelle does something wrong she DOES get a talking-to and occasionally she'll get punished, ex: The episode "Sisters in Crime".
Hidden Depths: Despite generally being not particularly bright, it turns out that Kimmy speaks fluent Spanish. She also somehow got a perfect score on her driver's exam. No, she didn't cheat. She's just a surprisingly really good driver.
Karma Houdinis: The worst they get for the below mentioned moment is a no longer amnesiac Michelle demanding her toy back.
Took a Level in Jerkass: In the finale, they take full advantage of Michelle's amnesia to get her to give them one of her toys. Probably justified because they're kids and don't understand the seriousness of the situation—but "justified" is not the same as "excused".