I don't know if I'll ever be able to decide which Hepburn is my favorite -- Katherine or Audrey -- but I guess it doesn't really matter, does it? My favorite Katherine Hepburn film is The African Queen, and my favorite scene is where Charlie Allnut (Humphrey Bogart) gets up one morning after really tying one on the night before, sits up, blinks...and sees Rose Sayer (Hepburn) sitting at the back of the boat, in all her proper British splendor, her parasol in one hand and Charlie's last bottles of liquor in the other as, one by one, she pours their contents into the river.
The first Katherine Hepburn film I ever saw was On Golden Pond:
About thirty years separate the two films. If that's not "aging gracefully", I don't know what is.