I think the troll is good - it feels cleaner than the others because it has larger areas (clusters in the local parlance) of colour, whereas the others feel a bit noisy.
I tried an edit of your player sprite to address two things
1) Weak pose - with his feet together like that, he looks scared - or like he needs the toilet Also, his sword arm feels too far out.
2) Cleaned up messy pixels, and simplified things a bit to try and make it more readable.
I'm not sure what you should do with the face though - the light coloured eyes contribute to the impression that he's terrified (eyes open too wide so we see a lot of the whites).
I couldn't manage to do any better with so little space, so I tried just putting it into shadow. Not sure if that makes him look less like a player character though. Maybe you could try giving him a less full helmet?
Oh, and why does he have bare hands if he's wearing full armour
Making things noisy on a small level is definietly something I need to work on, I usually get too carried away and just dot in smaller nuances everywhere when I am colouring and I should try to make it simpler, less is sometimes more heh
You're right about the pose, he does look scared when he has his legs together like that. Thanks for adressing it, I've never thought of it before until you brought it up.
He really is a lot easier to read now, thanks for the edit! I'm going to see if I can work something out with how you've posed him, might have to redo to make it easier to read him.
That isn't actually his eyes, it's the edges of the helmet
IT sort of looks like eyes though. I can see what I can do about his head, I'll work on a couple of helmets (and possibly even doing just a head for him).
I guess I wanted to break out of having a full plate I guess, should probably make that leather gloves at least.
I'll get working on it as soon as possible, thanks a lot for the edit and criticism, it helps a lot