I'm noticing that recordings I mix sound good (even instrument levels, nothing sticking out in a bad way, etc) on many different systems when the EQ is left flat, but as soon as I play with the EQ it creates massive changes to the sound, (ie. certain instruments go away or become overwhelming). EQ adjustments on commercial CD's don't seem to have this problem in general...

Just was curious if there was any place that I could find out what kind of approaches engineers took to get the killer sound out of my favorite artists.

cheers