Ok. Fair enough...
They look scribbly and unfinished - regardless of content, like you got bored of them and moved on to something else (scribbly isn't a style by the way

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They look flat because there's no sense of form, value or light, (but that was discussed earlier) or distance - for instance, in 'tied up' you've used the same level of shading for the whole road, which flattens it - try to think things in the distance are faint (tone wise) and indistinct and things closer will be darker and more distinct.
If we brought the lady in the rear up to the scale of the dog walker she'd be huge!
You started to use your pencil strokes to define form in 'evil clown', but then you gave up on the legs and threw it all away on the ground (JMO). Try to be a bit more consistent.
You get out what you put in - so the more you study and practice the better you'll get.
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