He has a habit of painting random muscle porn, especially if it's horse-related. In the edit "it's not lupus", the crew witnesses Data shamelessly painting one of these, declare him irreparable, throw him out the airlock, and blow him up with a proton torpedo.
In "PicArt", after looking at Picard's painting of a horse playing a saxophone, Data proceeds to kill everyone on board, throw the painting out of the airlock, and blow it up with a proton torpedo.
One-Man Army: Consider Homestuck's legendary update rate coupled with the occasional Flash animation/game. Though he's supported by an art team which occasionally contributes assets to said Flash animations and a music team that does all but a small few musical samples, it's still impressive.
Manipulative Editing: Despite being the writer of the scenarios, his old movie and tv edits have... interesting stories.
Stylistic Suck: A specialty of his, usually explored through art but occasionally through writing. He has said that his goal is to replicate the Uncanny Valley which the works of inexperienced artists who are just on the very edge of actually being good naturally occupy.
The Sweet Bro and Hella Jeff book takes this to an art form. The fancy, gold foil stamped hardcover has a random patch of glossy finish resembling a coffee cup stain, with letters made out in the same way next to it spelling out "woopps".
Troll: After exploring Picard's painting a collage of the scenes from Star Trek: Generations in "a frank evaluation", Data proceeds to sloppily paint horse porn over it, much to the chagrin of a crying Picard. Data could barely hold his laughter after leaving the room.
Tsundere: Picard in the edit "such tenderness", who expresses his hidden love for Riker as he watches him caress Geordi's feet on his screen with a declaration that can be heard throughout the entire Enterprise.