Are you looking at reference when you make stuff? Or just creating it off the top of your head? I think you should work from a solid reference piece. (a smallish prop) and then model it (high poly) to the best of your ability and post the final high poly side by side in here for critique. You're working hard and improving....but you are missing a lot of what makes a model a good model, and best practices for texel density or UV layout...and general appeal. Baby steps.
hmm...no context or overview forth coming via this thread's author, just a collection of random 'things' and IMO without any noticable improvement over 3yrs...
Quite possibly a candidate for the sketchbook section?!
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Do a teaspoon next~!
Do a foot next~!
Do a man in the moon next~!