I don't want ever to be champion again.
The computer age has arrived, and it influences everything: analysis, preparation, information. Now a different talent is required - the ability to synthesize ideas.
Recently I saw Kasparov and he looked to me as still young and potent champion.
Time control directly influences the quality of play.
The best indicator of a Chess Player's form is his ability to sense the Climax of the game.
For example, computer defends well, but for humans its is harder to defend than attack, particularly with the modern time control.