Uh yeah I hope you people realize that because of the tuning system for the piano (equal temperament), all keys are actually exactly the same. Since the chromatic scale divides an octave into twelve equal-ratio steps, the frequency ratio between adjacent notes is 21/12. All intervals are equally spaced. For example, a C major chord is the exact same thing as a D major chord, its just that in a D major chord, everything is brought up a whole step (or down a seventh), its not like the intervals change, or the sound gets any "brighter" or "darker."