On the side he's also a musician, playing a mixture of indie, folk and psychedelic rock in the band Grape Digging Sharon Fruits, playing harder, Post-Rock-ish material as I'm the Manager, or releasing electronic solo material under the handles Locust Toybox and Stegosaurus Trap. Firth also directed the music video for Flying Lotus' single "Ready Err Not," which premiered on Adult Swim in Halloween 2014.
- Black And White Cartoon
- Burnt Face Man
- Jerry Jackson
- Not Stanley
- Salad Fingers
- Spoilsbury Toast Boy
- The World Within a Sock
- The News Hasn't Happened Yet
- Ascended Fanboy: Firth is a fan of Warp Records artists like Aphex Twin, Boards of Canada and, most notably, Flying Lotus. He has, through the reputation he garnered for himself via Salad Fingers, ended up collabing with FlyLo several times and even has a writing credit on Flying Lotus's film "Kuso".
- Black Comedy
- Limited Animation: Notable during his early days when using Flash. This began to disappear over time, espcially when Firth began using After Effects.
- No Indoor Voice: In Not Stanley.
- Oop North: Firth was born in Doncaster and currently based in Leeds.
- Silly Walk: The main character in Not Stanley walks rather weirdly.
- Surreal Humor / Surreal Horror: His body of work fluxes wildly between the two.
- Take That!: In his "Music Guess 2009" short, David Firth takes a stab at the music industry and the Lowest Common Denominator they're aiming for.