What's your favorite key?

You've got bad "ears" then, because I can definitely hear transpositions and the like very clearly. Are you saying if you're listening to, say, a Beethoven concerto, all the shifts through key centers sound the same to you?

Yes, I do not have perfect pitch and cannot differentiate between CMajor and DbMajor days apart, but a majority of people - like me - do not have perfect pitch. I am happy for you that you do have perfect pitch/relative pitch etc. etc. - most people do not. I can however differentiate when played write next to each other - I specified separate mornings. I said the same melody played a semitone apart, I did not say a Beethoven Concerto. A Beethoven concerto has many emotional compositional methods that hinder the true difference between keys.

Any key can be "easy", it all depends on your familiarity with it. I (and I'm sure many other accomplished pianists will agree with me) find C major one of the most difficult keys to play in as you have no bearing of where you are, no black keys to align yourself with. On the same note, Db can become one of the easiest keys to play in as you know your only white notes are F and C.

I know, I am just very lazy and never bothered to learn very sharp or flat keys :P. I do realize that C# major and B major, for example, are (or should be) easy to play in... wasn't it Chopin who thought B Major was the scale most suited to the anatomy of the hand? And for some reason I like F# minor and F minor.

And I hate F Major the most.

i constantly compose in G Minor. its annoying. cant get away from it.

C minor would be next, as i am very familiar with it as well.

And for improvising; the more black keys the better...i can do scales really fast in those keys haha, so improvising is a blast.

Well, then try composing in a key, then transposing the whole composition up or down a few tones. Try some different ones, see how you like it.

Eb Major and G Major. Eb just has a warm feeling and G major sounds very bright.

My favorite keys are definitely F minor and B-flat major... though whole tones are cool, too :D.