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.
Face of the Band: Rob and Gareth to a lesser extent. While many people certainly know who Perry, Ben, and KJ are, Rob and Gareth are generally the two always interviewed for the group and are the ones who lead the group in terms of songwriting and production. Rob gets this trope a bit more than Gareth: he's always the one demonstrating production/songwriting in more technically-based interviews (often by himself), and is always the one getting bitched out by the fans. In Silico having a new sound? Pendulum on hiatus? DJ set not playing in a city? It's always Rob getting the complaints and insults, whether it's on Dogs on Acid, Twitter, or Facebook.
On a greater scale, Pendulum and the British rock scene. While the drum & bass side of the fandom lost it after In Silico (mostly coming back withImmersion), Pendulum seems to have a massive amount of respect from rock fans since then, with the general idea of "yeah, these guys are electronic, but they're just as metal as everyone else at this festival". Hilarious in Hindsight and ironic after many of the "fans" on Dogs on Acid basically told them that they weren't "hard" enough for rock fans to like them; even more so if you know Rob and Gareth's musical history: being rock musicians before being drum & bass producers.
Magnum Opus: Hold Your Colour. Not only to the band, but to the ENTIRE drum and bass scene. Immersion is a very close second, although it might even replace Hold Your Colour as the band's magnum opus.
Hell, Pendulum is pretty much this for the entire dnb genre: it is the most successful drum and bass band in the world.
Ship Tease: There's an interview in which Rob and Gareth are asked if they're married. Gareth instantly replies "To each other?" with a massive grin on his face, which causes Rob to respond with an almost mortified "No".
Becomes Hilarious in Hindsight when you find out that Gareth is practically the walking embodiment of Have I Mentioned I Am Heterosexual Today? (to the point of being embarrassed when buying cucumbers for a tonic) and Rob is generally the more secure one of the pair who has no problems joking on Twitter about how he and Gareth are a gay couple.
Tear Jerker: The music video for "Crush". "Witchcraft" as a song is quite depressing too.
"9000 Miles" is thought to be about Rob Swire missing his hometown of Perth, Australia, which is around 9000 miles from his current base of operations in London, England. Rob's voice is both incredibly tearjerking and utterly awesome.