Alright here's a pet peeve of mine.
I don't like when people wear band T-shirts for bands and don't know a single song by them. A lot of conversations end up going like this.
* Sees girl wearing Pink Floyd or Rolling Stones shirt*
"Oh hey, I love your shirt!"
"Thank you!"
"What's your favorite song by them?"
"Oh, I don't like the band I just thought the shirt was cool."
Like...why? So you know it's a band, you think the bands name is cool, and you think the bands branded Tees are really cool, but you didn't think their music is worthwhile to even check out? I don't get it, man. Not at all.
I end up telling them to go listen to Comfortably Numb or Another Brick in the Wall, Pt. 2 for Pink Floyd and Gimme Shelter, Sympathy for the Devil, or Beast of Burden for The Rolling Stones.