I've created a small list with the audience preference which shall help you choosing the right films.
The user classicalclarinet made a nice sheet[docs.google.com] you can print yourself.
i use a similar hard copy, it's very helpfull.

Men

• Action
  
• Sport, Western
  
• SciFi, Horror

Women

• Comedy
  
• Drama, Show
  
• Love, Horror

Children

• Fantasy
  
• Comedy, SciFi
  
• Western, Music

Elder

• Docu
  
• Western
  
• Show, Drama

Lovers

• Love
  
• Drama, Music, Horror
  
• Show

Musicans

• Music
  
• Horror
  
• Fantasy, Action, Western

Athlets

• Sport
  
• Love, Docu
  
• Action, Drama, Comedy

Geeks

• SciFi
  
• Fantasy, Docu, Western
  
• Horror

Every broadcast gives you love for every group affected.
When you broadcast a wrong category you lose 2,5% love for the affected audience.
Regardless if they are sitting on the couch or not.

Tier 1 gives you 10,0%
Tier 2 gives you 5,0%
Tier 3 gives you 2,5%

you should also notice, that

Originally posted by gendark:

At day 21 the IA would use a 16% marketing and a 20% marketing in expert difficulty, with the added bonus of the audience analyst. Also if the IA is losing the fame race, by 20 fame or more, they start getting little audience bonuses, those bonuses get bigger based on the difference of fame with you, more bonuses are given in expert than in advanced difficulty. That's done to keep the last sprint of the 300 fame race interesting...
...With a 2 block movie the second block gets a flat % of the audience of the first block, even more with a 3 block movie, the third block also gets a bigger % flat audience increase based on the audience of the second block.

This guide based on expertmode by simple restarting and check out how every genre affects every group.