So yeah, that stereotypical pretentious hipster genre known for it's twenty minute songs? It's actually pretty good imho. Most of the postrock albums I've heard are very relaxing, and great to listen to as background music. But at the same time it can be extremely engaging if you let it be. I'm sure you've heard of Mogwai or Godspeed You! Black Emperor, or Explosions In the Sky, but what are some other bands do you listen to, or have heard? I've recently gotten into some Japanese postrock, people like Kashiwa Daisuke, and Yasushi Yoshida. But my favorite so far goes by World's End Girlfriend. Check it out.