I know with flavor for everyone I think it is too fickle but that is just me, I do not think my check is limiting others but I do feel it is diverse.
I do feel at times I have to have at least a good interest check to me or borderline perfect to at least even get a chance to have someone glimpse at it at all though I feel others still have a easier time than I do when it comes to it, while I do also have plot ideas I feel it may not help me with my current issue at hand.
The idea of regular posts in the rules is something I'll probably add to it and to get rid of some of the things to make the right changes, I'm aware it may not appeal again (Tried it with editing another and fixed it and it didn't work) and those fickle tastes didn't even come my way.
I'm not sure on what you mean by 'analyze yourself' and I've given group rp's a chance before and it died then so I am hesitant to try it, 1x1's are not working out for me for the first thread I had mentioned and worldbuilding I'm not sure so I'm more of in a bind than anything I feel.