They are best known for being super exclusive and elitist and looking down on those who follow the trends dictated by the mainstream.
They also seem to miss the entire irony of how they buy thrift store" clothing from department stores. Just feeding into the "mainstream" culture of consumerism that they claim to be countering.
But getting to the heart of hipster culture, it should be understood that true hipsters care a lot but they don't care. I.E. it’s all about the image. They spend obscene amounts of time calculating their outfits, the bands they like, and the hobbies that they're into. However, they have to pretend that all of it bores them, and that it comes naturally... because only the coolest hipsters don't try, yet still manage to be subversive and hip.
They also tend to be seen in obscure Indie concerts, in their own bands, being DJ's, owning or working at "subversive" yet lucrative businesses like t-shirt printing shops, chain smoking, shopping at Urban Outfitters or H and M, attending liberal arts colleges, or playing competitive dodge ball (because it’s so lame its cool)
if its "cool" its lame, and if its dorky its amazing!
Therefore the hipest things ever have to be Mullets, Knee socks, and Barney the Dinosaur!
Hipsters often speak about esoteric musical bands from decades past, or bands from small towns few have heard of, but which are now based in Greenwich Village. When other hipsters (or worse, members of the general public) have heard of these bands, hipsters feel great frustration. Skilled hipsters mask this frustration by instead denouncing the band, explaining, "I was just trying to talk about a band you probably had heard of, because I am a really inclusive person, and I didn't want anyone to feel left out."
Hipsters often feel they are the best adjudicators of art, including films, music, literature and poetry, and visual art. The average hipster has read 2000 more novels than the nearest hipster in the cafe he or she is doing nothing in.
Hipsters often have no fixed income, yet they have all of the latest technology, most of which have a white apple symbol.
"Sure do. Why does he have so much swag?"
"Because he's a hipster."
"I see. Makes sense."
Hipster: "Nothin, just listening to my friend's band's new album. It's called 'Underwater Station Cinema Five Layer Burrito Club'. Have you heard of it? That's right. Didn't think so."
Non-hipster: "Dude... I really don't care."
Hipster: "... It's ironic because burritos are real mainstream."
And the rest of America.