These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Follow the Leader: While it was already pretty trendy in the '90s, his penchant for profane, sarcastic dialogue spoken by 20something going through their quarter-life crisis gave way to a slew of copycats from Clerks onward, even helping to spawn the entire "mumblecore" subgenera.
Hilarious in Hindsight: Any one of his movies that has both Ben Affleck and a Batman reference, as he was later cast in the role in 2014. Jersey Girl is probably the biggest one, as Ben Affleck's character is a garbage man who calls his truck "the Batmobile".
Lowest Common Denominator - Though Smith's work often plumbs the thematic depths of philosophy, love, faith, family, and friendship...
Holden: "It's like my grandma said. The real money is in dick and fart jokes."
Narrowed It Down to the Guy I Recognize: His cameo on Law & Order actively subverts this; Smith noted that rather than play the killer, he instead wanted to play "the guy who leads them to the guy who leads them to the guy who leads them to the guy that did it".