I tend to agree with the above posts of Jeremy and Mark. I'm no master of the mastering by any 2 bits...however, in my little world of audio, I have noticed a few things...
I use Bias Peak on a MAC platform. When I first got the software up and running, I was a mastering fool...everything that was on 2 track DAT found it's way on my MAC HD and compressed, smashed flattned out like a piece of paper...the hottest possible levels without clipping...talk about tomatoe indicators!!! but I wanted to see how far I could push the limit! (Pun intended). Ahem, anyway, what I did this past weekend was to take a couple of those songs and remaster them so that they were not as hot - more dynamic range...I think the lower levels sound more natural and realistic, punchy, clean and articulate.
In this day and age with the bigger is better phatter is dumber mentality, I can see why most of today's music is pushed way beyond what is necessary IMHO. Call me crazy, but if someone's got to turn their amp up to 4 instead of 3 to get the same volume and their stereo goes to 10, what's the diff? oh, and yes, all my amps go to 11.

Alan