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.
Ensemble Darkhorse: Pumkin. The creators have evidently taken note of his popularity, and as such Pumkin's been pretty much the main focus of Season 2 so far.
Epileptic Trees: Fans have speculated that the Basemen Monsters' Pie Portal is actually a Pumpkin Pie made from Pumkin's innards after he was carved by the Basement Monsters.
Growing the Beard: "Guess Da Number" starts it when things become slightly more comprehensible and Baman and Piderman start becoming more distinct, as well as introducing That Guy and The Other Guy. Continues in "Hab Da Sleepover" and "Happy Winter Friends" makes another big leap.
"Weirdy Feeling" is another leap forward in every department.
In Revealations Part 2, we get Piderman becoming very distressed when he discovers that Dese Guys were in the Baman costume and that Baman was missing, and Pumkin calming him down by stroking his head.
Memetic Mutation: The original short before it got picked up by Mondo, and mentioning shipping Pumkin and Squib is becoming one as of late.