I read three different surveys on Stereophile and found them interesting for this forum making them one:
1. What is the best CD to evaluate the performance of equipment? (e.g. to decide what to buy)
This is mostly to detect flaws
2. What is the best CD to demonstrate to other people you have a wonderful system?
This is mostly to hide flaws and impress people
3. What is the CD you love the most, without thinking in the other two questions?
This is just for joy (or whatever you like the most) (I mean, some people like pain...)
I'll post mine later. I'm still thinking.