His own voice comes through loud and clear in the fangames: Bikdip has never even heard of suspension of disbelief. Every story ends with the main characters complaining that the whole adventure was pointless and nonsensical.
In one segment of FireRed Omega, he fights an opposing Trainer's Crawdaunt and mentions that he had a joke relating to crabs, but forgot to make it when the Crawdaunt was initially sent out, and felt it wouldn't have the same effect afterwards. Several segments later, while fighting an opponent's Kingler, he again complains that he forgot to make said crab joke. Fast forward several more segments, and he finally makes the joke once he sees an opponent's Crawdaunt.
In episode 2 of Kaizo Mario 64, he mentions having 3 different versions of Mario 64 on his computer, including a demo of Super Mario 74, which he would LP about 2 years later.
And also the fact that he loves making obscure references that 99% of his audience won't understand...
Creator Backlash: He's pretty disappointed in the 1500 Videos Special Top 15 Moments List, since most were from the Emerald Run and other very recent projects. Many of his best moments were from years ago, but most new viewers were only familiar with the recent material.
Determinator: "When there's a part in a game that is like, freaking impossible, I get dedicated to it, and I'll get really freaking pissed off at it, but I'll keep trying. I just can't be around other humans when I'm doing it."
Do Not Call Me Paul: Much prefers his pseudonyms "Jish" and "Bikdip" over his real name, Josh/Joshua.
Evil Counterpart: Bikdark is this to Bikdip. As a bonus, he is playable in the second game. The game gives no reason for Bikdark's appearance, origins, or even his motives. As Jish commented, he knew we were expecting some lame excuse, so instead he gives us nothing. Beautiful.
Fan Nickname: Shortly after the English name of the Pokemon "Conkeldurr" was revealed, he resolves to call every Chuckya in Kaizo Mario 64 a Conkeldurr.
Guide Dang It: The Burn the Map Puzzle from Bikdip's Adventure, and the entirety of the Ultimate Secret to find the Mitch Overworld in Bikdip's Adventure 2. Especially the part where you have to hammer the one block which, due to a glitch, gives no indication that it can even be hammered at all.
Idiosyncratic Episode Naming: Every part has a title that contains some in-joke, reference, pun, or some clever joke that relates to the events of the episode or something about the game.
Million-to-One Chance: In Pokémon Emerald Parts 45 + 46 (one big segment) he says around the halfway point that he's tired of seeing Tentacool, and goes on a small tangent saying he'll see a shiny Tentacool. At the end of the episode...it happens: a shiny Tentacool shows up, and he breaks down rambling about the impossibility of it. He then names it Karma.
Oh, Crap: After spending hours on the brutally difficult fourteenth course in Super Mario 74, the Luminium Sphere, he ends the video by checking out what course fifteen looked like. His reaction when he realized the Ombru Sphere was the exact same level but upside-down is simply priceless.
Old Shame: Despite being a relatively decent game, he frequently considers Bikdip's Adventure 1, his first Zelda Classic quest, to be far inferior to his other games.
He also doesn't seem to like the Bargo the Bikdip stories he and Harrison wrote about the 'Strange Creatures'.
One of Us: Makes a few references to TV Tropes, even met his wife through us!
Running Gag: In FireRed Omega, he repeatedly mentions Electrode's capability to use Sharpen and turn into a cube.