Post and Homogenic are the core of Bjork's discography; the rest is all about moods. I see you have discovered Vespertine, which is a very celestial record. I often listen to this one when I am confused and need guidance. Listen to Debut if you want to dance your face off. Listen to Medulla if you want to get even weirder and deeper into her obsessive mind, or your own for that matter. Listen to Biophilia when you need to relax, and then listen to Volta if you're into Antony and the Johnsons and/or Timbaland.
Needless to say Medulla is my shit, and I am confident that it will soon become your shit as well.
I see you have discovered Vespertine, which is a very celestial record.
I bought Vespertine the day it came out and absolutely fell in love with it. "Hidden Place" felt like a song written specifically for me. Winter started perticularly early as fuck up in this snowy cold ass burgh in 2001 and Vespertine could not have been a better daily soundtrack for the long dark cold Edmonton months.