Lynxara
Nice post!!
The impression that I'd got of Kenzaki's is that he's doing all the Undead hunting and stuff solely for the money, at least in the very beginning anyways.
I always felt Kenzaki's backstory was meant to establish that the "job" aspect of being a Rider was immaterial to him-- he'd do it for free if he could. If anything, a lot of his struggle in Blade seemed to be dealing with other guys for whom being a Rider really was just a profession.