wow Mac, thanks for the detailed info! Aside from the preferences of those composers (and of course their audiences) do you believe the different keys invoke different emotions? I understand why a major key sounds happy and a minor key sounds sad but I don't understand how this also applies to the difference between two major keys (unless it is pretty much subjective).
I don't think it is subjective and the fact that many composers, great musicians and the likes tend to agree on most of the keys bears witness to that.
Like I said above, if interested, you should Bing or Google more info, it is well known, old as the hills, as it were, and taught in universities.
BTW - Following Rimsky's or Handel's lists for what the key signatures convey has always worked well for me in practice.
But like I also said, it is not necessarily one of those things that is "etched in stone" when it comes to jazz, pop, rock, etc. tunes. Most of those kind of genres don't as a rule use all 12 keys anyway, eh?
--Mac