The better your equipment, the more you are going to notice differences between recordings, both good and bad. There's nothing we can do about improving the recording, it *is* the source. I'm finding myself increasingly more concerned about buying better recordings than better gear.
If you're system is biased with coloration, it will tend to make everything sound more uniform. Some find this more pleasant to listen to because it helps hide the imperfections of recordings. It's a double edged sword, a choice between either pretty and artificial, or real and wrinkles.