GrimmIchi really has to be done a certain way for me, I have a thing about canon-ness that I have difficulty getting over sometimes :D I think that's why I like RenIchi so much, I can really see a LOT of different versions of their relationship and it works for me ;) But canon GrimmIchi can sometimes get very dark too, so it's a fine line. Then... Hichi/Ichi, I was talking with Figaro about this at some point, it's like there's two different versions of Hichi, the REALLY evil one and then the kind of evil one who's like... kind of working with/cares about Ichigo. I can kind of go either way with that, got lots of theories on him. ;) Have NOT actually found 2metaldog yet, I'll have to check that out soon! And Zaraki, I think it's because he's such a monster, he really just pwns whoever he's with and it's pretty much believable XD The Zaraki/Ichi dojinshi I saw played off Zaraki always wanting a fight and Ichigo not wanting to do it (Broken Box?), and of course the Zaraki/Ren one you (and Figaro, damn I owe her a lot!) got to me was pretty believable too. Renji gets around sometimes 'cause he's been under a couple different captains now ;)

Weird I should care about believability. They're cartoons, FFS. Sometimes I have to remind myself of that. Actually a lot I have to remind myself of that. XD