The parameters are... You walk into a new friend's home. They slip out to take a whiz or whatever, you take a quick peek at their CD/Album collection what are a handful of albums that must be in there for you to consider inviting them out to another function.
Or just what are some albums you think every person needs to have in their personal collection to show they're a well rounded open minded person?
I'll sprinkle in a few throughout the thread.
I start with: Image: http://ventvox.com/wp-content/uploads/2008/10/folsomprisoncover.jpg