Man, I dig pretty much everything you post here. I think you should feel pretty confident of your results, which is not to say you shouldn't be asking people here to improve stuff, obviously, but still, it doesn't feel dirt to me. What little banding or stray pixels you have seem to be a conscious decision to keep you style intact, with the precision of shading/AA you need in tight surfaces. I don't think I would clean anything there.
You might say your stuff don't have character, but you style definitely shows in all your posts, mostly on the way your highlights show curves (that teal knight of yours with the ball-hammered armor texture that people read to look like water, comes to mind as strong in your style).
If you mean that it lacks character only in it's posing, (not sure if I agree) then go back to paper and see if what you can come up in pencil that feels energetic to you, you seem very capable to translate any shape you come up into pixels, but the preoccupation with pixel technic often hinders my creativity as well when I try to do both things at the same time. Perhaps more pencil (or non-pixel digital art if that is your thing) will set you free, from what you have posted I doubt your traditional media would look bland or without character.