Depressed Drawings?

One of my university tutors recently commented on some of my latest drawings and commented that they look "depressed" (!)

I'll leave you to decide for yourself...

The top three drawings are of my house keys and the bottom two are close-up details of the buckles on my little grey ankle boots.

Black and white cartridge paper, charcoal, pen, stitchwork.

So, what do you reckon?