Drawing from Reference (Continued...)

Continuing on with my reference drawing work I completed the remaining illustrations for the last three reference images I found. Here is an example of each:

I'm quite unhappy with the pieces that I've made here. My illustrations are basically poor facsimiles of the images I used to reference from. There isn't a strong investigation of ideas here and it's clear I'm being quite reserved with my technical ability. I must work on my ability to draw from reference. Maybe I could take away detail to make the images less complicated/more visually appealing?