When Leonard and I lived in the Bay Area and drove south to Bakersfield to see his mom every few months, he got a satellite radio subscription. I'd navigate the music channels and look at the device to see the name of the artist and ask him to guess. When he couldn't tell, he often guessed "REM" (for loud stuff) or "Belle & Sebastian" (for quiet stuff).
Right now I'm working on an ambitious fanvidding project and am thus watching a bunch of other ambitious fanvids (e.g., chaila's "Watershed", danegen's "Around the Bend", counteragent's "Coin Operated Boy") to take notes on technique (e.g., exactly how many 100%-dark frames serve as a good stutter in frightening montages, versus how many blank frames help reset the eye and prepare it for a new sequence). Just now I was watching "Another Sunday" by Jescaflowne, set to "We Built This City" by Jefferson Starship. I checked the timecode scrubber. "Hey Leonard," I said facetiously. "Did you know that rock songs used to be four and a half minutes long?"
He looked at my screen as we made up Freakonomics-worthy nonsensical explanations of why this used to be the case. "What show is that?"
At this, Leonard developed a hypothesis that Stargate Atlantis and Supernatural are like REM and Belle & Sebastian, viz., if he can't tell what fandom a vid is, and there are spaceships and lots of guns, it's SGA, and if there are no spaceships and nearly no guns, it's Supernatural.
As a data point, I've watched zero SGA and one ep of SPN ("Fan Fiction"), but have spent happy hours enjoying fic and vids about both, particularly the critical readings -- if you're waiting for Ann Leckie's next Ancillaryverse installment, you could do worse than reading "Second Verse (Same as the First)" by Friendshipper/Sholio. I wonder whether the same thing will happen to me with Teen Wolf.