BOOK: Recommender Systems, The Textbook

http://link.springer.com/book/10.1007/978-3-319-29659-3

Table of contents (13 chapters)

• An Introduction to Recommender Systems
• Neighborhood-Based Collaborative Filtering
• Model-Based Collaborative Filtering
• Content-Based Recommender Systems
• Knowledge-Based Recommender Systems
• Ensemble-Based and Hybrid Recommender Systems
• Evaluating Recommender Systems
• Context-Sensitive Recommender Systems
• Time- and Location-Sensitive Recommender Systems
• Structural Recommendations in Networks
• Social and Trust-Centric Recommender Systems
• Attack-Resistant Recommender Systems
• Advanced Topics in Recommender Systems 

Personality Based Recommender Systems are the next generation of recommender systems because they perform far better than Behavioural ones (past actions and pattern of personal preferences)
http://onlinedatingsoundbarrier.blogspot.com.ar/2016/03/paper-tensor-methods-and-recommender.html
That is the only way to improve recommender systems, to include the personality traits of their users. They need to calculate personality similarity between users.

In case you had not noticed, recommender systems are morphing to compatibility matching engines, as the same used in the Online Dating Industry. 

Which is the RIGHT approach to innovate in the Personality Based Recommender Systems Arena?
 
The same approach to innovate in the Online Dating Industry == 16PF5 test or similar to assess personality traits and a new method to calculate similarity between quantized patterns.  LIFEPROJECT METHOD

All other proposals are NOISE and perform as placebo.