Delete Please!
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loosen up! your line weights are very static and it looks like you’re being very careful with your lines. while that is a good trait to have, you need to have some gesture and movement in your sketches! relax and have fun!
I’d check your perspective with guidelines, too (especially the PS controller). Keep them coming!
Im not entirely sure how to phrase this right in English, but it shows that you are depicting(figure drawing?) something you are looking at rather than sketching/drawing something that you want to explain/explore… Atleast in the first two urls are pretty obvious of that.
Theres nothing wrong with doing that, but then id suggest you observe it, try to identify whats important to get it right, and hide the object while you are sketching it.