Academics from all over the World had begun to publish Scientific Research using the HEXACO

Please see the paper:
Role of honesty-humility, emotionality, extraversion, agreeableness,  conscientiousness and openness to experience personality dimensions, emotion regulation and stress coping strategies in predicting the quality of life in migraine peoples
http://jmums.mazums.ac.ir/files/site1/user_files_0d0bf0/reza_snu-A-10-2869-1-fef9f4d.pdf

 ----------------------------------------------------------------
The normative Big5 model (a.k.a. Big Five, FFI, FFM, OCEAN model) to measure personality of daters had been proven/revealed as an incomplete and incorrect model to measure personality of daters. Now replaced by HEXACO test, a.k.a Big Six test. The BIG5 normative personality test is the biggest mistake Psychologists made since several years ago. The BIG5 is also known as the Five Factor Model theory of personality traits, a psychological model based on research by Paul Costa and Robert McCrae.

Academics from all over the World had begun to publish Scientific Research using the HEXACO model of personality and they plan to discontinue the Big5 model (a.k.a. Big Five, OCEAN or FFI five factor inventory, FFM five factor model). Online dating sites using the Big Five model could be considered obsolete sites, because the Big Five model has been proven as "an incorrect and incomplete model of personality"
As some of the subdomains of the main domains of the HEXACO model are different from the subdomains of the main domains of the Big Five model, it can not be simple added the scale of the Honesty-Humility factor to the Big Five model to upgrade the personality test to the HEXACO model.
".. the Big Five's Agreeableness and HEXACO's Agreeableness are not identical. The Big Five factors do not include an Honesty-Humility factor, but some of the characteristics belonging to Honesty-Humility are incorporated into the Big Five's Agreeableness factor. Although earlier investigations found only the Big Five factors, more recent studies conducted in various languages (including English) with larger sets of adjectives recovered six factors. "

Online Dating sites have very big databases, in the range of 20,000,000 (twenty million) profiles, so the Big Five model or the HEXACO model are not enough for predictive purposes. That is why I suggest the 16PF5 test instead and another method to calculate similarity between prospective mates. Also to take into account women under hormonal treatment because several studies showed contraceptive pills users make different mate choices, on average, compared to non-users. "Only short-term but not long-term partner preferences tend to vary with the menstrual cycle".
[Also some Psychologists began to encourage the use of other tests for the Online Dating Industry, like:
California Psychological Inventory (CPI)
and
The Millon Index of Personality Styles-Revised (MIPS Revised)
but my best recommendation is, of course, the 16PF5 normative personality test.
Nor the CPI nor the MIPS can outperform the 16PF5.]
-----------------------------------------------------------
If you want to be first in the "personalization arena" == Personality Based Recommender Systems, you should understand HOW TO INNOVATE in the ............ Online Dating Industry first of all!


What comes after the Social Networking wave?
The Next Big Investment Opportunity on the Internet will be .... Personalization!
Personality Based Recommender Systems and Strict Personality Based Compatibility Matching Engines for serious Online Dating with the normative 16PF5 personality test.