ZM lenses are higher in contrast than many (CV/Pre-asph etc) lenses and will inevitably cause some issues shooting scenes with v. high brightness ranges, compared to a lens of lower contrast, when using digital sensors. It all depends on what you are doing and under what conditions..and what you like. Personally I would recommend a lens of lower contrast shooting on digital, as would some others. What a person chooses to do and why is their call; however high contrast lenses with high contrast scenes and digital sensors is regarded by many as being tough to handle. Lower contrast lenses make capturing the full range somewhat easier.
Whether or not I like your images has no bearing on whether the above is worthy of consideration, because 'liking' is subjective and does not tell you a lot about why or what factors into that. I have just looked at your 28 biogon images and some are missing the entire range of tones. The image of the hat on the table has blown highlights on the sun beaten tiles outside and a lower contrast lens would have helped control those highlights while retaining shadows (if that was your aim). The one of tree 'shadows' is another example,as is 'ripe tomato', where lower contrast might have helped, but it all depends on the look you are after. I think these images show very clearly how a digital sensor can struggle with a high contrast lens shooting a high contrast scene.