With very few exceptions (and apart from establishing shots of locations at the beginning of scenes) every shot is from a character's point of view (as if the viewer is seeing things through their eyes). Also, every single scene features either Mark or Jeremy, if not both.
Jeremy and Super Hans constantly change the name of their band from episode to episode. In The Interview (2003) Super Hans says it's called The Hair Blair Bunch or Spunk Bubble, Jeremy says it's Momma's Kumquat, in University Challenge (2004) it's Coming Up For Blair, in Holiday (2007) it's Various Artists ("to fuck over people with iPods") and in Jeremy's Manager (2008) it's Curse These Metal Hands. In Man Jam (2010), they join a band called Man Feelings. Jeremy gets kicked out of it but when he gets a job working for Ben's website he promises to get them featured on it on the condition they change their name to Danny Dyer's Chocolate Homunculus. In Jeremy Therapised (2012) Super Hans decide to officially end the band but neither of them can remember what it's called, Jeremy guesses it's 13 Bastards.
In an interview for The Culture Show (2004) Jesse Armstrong and Sam Bain said that two of the main inspirations for Peep Show were the scene in Annie Hall (1977) where Alvy and Annie are talking and their real thoughts are shown as subtitles, and also the documentary Being Caprice (2000) (which in turn was inspired by Being John Malkovich (1999)), which used a POV style of filming that they thought was an arresting technique which would go well with the inner thoughts/voice-overs of Mark and Jeremy. They also cited Danny in Withnail & I (1987) as an inspiration for the quirky, drug-addled Super Hans (also the dynamic of an even weirder third character alongside a double act).
Super Hans was originally written with Danny Dyer in mind. Russell Brand also auditioned for the part and Jake Wood was one of the final three before Matt King was cast.
'Peep Show' was originally set to be called 'POV', after the show's Point-of-view perspective. The idea however was scrapped as writers Jesse Armstrong and Sam Bain felt that the title would make the show sound 'too gimmicky'.