>>379
I've found over time that I don't really care anymore how much the plot diverges from canon so long as it's coherent and not completely asinine, but what I really read fanfiction for is the characters. Whether it's expanding on the characters, or interaction between the characters, or exploration of the characters while exposed to differing situation, I can't read a fic anymore that does nothing with the characters.
Along the same lines but with slightly less intensity is my view on using the setting, but that might just be because most of the "fandoms" I have interest in have a vast potential for setting exploration/explanation that isn't too present in the source material.
I don't really care how much the plot sticks to canon so long as the characters and setting are used well.