Read Purple Cane Road a while back. Did not like. At all.
Poorly told, full of contrivances and impossible situations. Loaded with implausible denouements and motives/motivations that did not ring true. Characters were caricatures and none behaved in a manner I found reasonably human.
Sorry, but just my opinion. Won't go back to his stuff.
You can't just randomly read Burke's stuff. The Robicheaux character is one that has gone through an incredible evolution since the first book - and there are around 20 of them now. You probably didn't get the character motivations because you didn't have a clue about the serious backstory that goes with nearly every character. The fact that many of the characters ARE somewhat of a caricature is a hallmark of his writing. But I say this in defense of that style of writing - it works for Louisiana. The residents of New Iberia parish and much of south Louisiana are so unique and their culture is so full of rich, flavorful over the top behavior with subtle nuances of weirdness that what seems a caricature to you actually allows anyone who has spent any time there, or who has dealt with anyone from there, to say "Yeah, I know someone JUST LIKE THAT."
On the other hand, you seldom give positive reviews of anything, and your opinions, once made, are cemented in concrete and covered in Super Glue, so I won't bore you with any further explanation.