Putting things into categories is a useful and common practice, and I like the ones you've chosen, however I don't necessarily agree with everything the way you have laid it out. To each their own of course
A radar chart would be useful but, since this is somewhat subjective, it would still be biased, just like these tests. I still think the best thing to do is have an actual chat with several different people; like you said just in multiples.
I know what you meant by clone of canon but, for me, I have come to switch my opinion on that and don't see it as Mary Sue anymore, just being a copycat. Just another reminder of why I am updating.
I personally don't give a rat's bottom about 'Anti-Sues' lol going from one extreme to another doesn't somehow invert what you end up with. I should probably do a little write up on that...
I was referring to how not all fanfiction have parings (shipping) - I know exactly what you meant.
"I'm not a slave to canon." - what did you see now? I know what that means obviously but I don't know what you're referring too. As for fanart vs fanfiction I think the fact that they're two different mediums, meaning two different sort of social groups, plays a role in that. Personally, I would think it's a tad harder to say piss off to canon in fanart because then people might have to actually read the description to a piece of art to see what fandom it's for and that doesn't always happen haha
No one seems to discuss the act of breaking canon or having characters go out of character for humor's sake. - I am not a part of the fanart world so I wouldn't know. I see crackfics all the time though so I'm used to it in the fanfic world.
saying "Awesome character!" is just buttering up without explaining why they like a character. - true, but this can also be laziness and is the same as people just saying "great story!"