The jail term, the cigar incident, the numerous bookings and bans—we all know the litany of Joey Barton's wrongs.
Then there are the things Joey Barton has undeniably got right—campaigning for Hillsborough justice, slagging off certain smug England players' literary efforts, much of his on-field work at Manchester City, Newcastle and QPR.
There is little doubt Barton's less savoury characteristics have hampered his football career. One England cap in a decade of generally high-quality Premier League football certainly raises questions.
And on the domestic front, his club career has been directed largely by personality clashes and the challenges of managing a player so constantly embroiled in difficulties, whether with the law, the FA, teammates or the press.
It is this dichotomy that makes Barton what the Guardian's Paul Wilson described as "the epitome of a moneyball signing." Barton is certainly a player who tends to be undervalued in terms of quality due to external factors.
And that is exactly the kind of player who not only can provide the right club with indispensable value, but will thrive under the right circumstances.
Here are five reasons why Joey Barton could be a huge hit at Olympique Marseille.