We can't be far away from TIVO being used as a diagnostic tool, replacing the Rorschach Test. My thesis is what we select to TIVO will reveal our idiosyncrasies and provide a new way of measuring personality disorders.
If your list is primarily figure skating competitions and musicals, you'd be, depending on gender, suspected of being either a female or homosexual.
Holocaust movies, war dramas and episodes of "In Treatment": clinical depression.
Sporting events, travel shows and the Home Shopping Network: agoraphobia.
Vintage movies and old sitcoms: dementia/Alzheimer's.
All of "The Godfathers" and "The Sopranos": psychopath.
Medical dramas and Dr. Phil: Hypochondria
Self-help, "Seinfeld" episodes and award shows: narcissism.