I normally don't critique artwork, unless the artist asks. In your post it does say input is welcome, so I'll lay down some sandwich critiques. (Positive, negative, positive) 1.) each of the three drawings is done with great contrasting values. Where most beginning artists will just utilize midtones and highlights, you were confident enough to add shadows/blacks to the designs. This allows a full range of depth in your designs, making the design aesthetically pleasing, and not flat. 2.) each of your designs looks to be light box replicas. The reasons why this is bad: Each of the images appear to be too small for the surface area you're working with. You want your focal objects to ATLEAST take up a 70/30 split. (70% foreground, no more then 30% background) Right now, your images look like they were printed on a piece of paper, traced the basic image and then added shading. Next time, work with the reference and design your own unique piece. (One way this can easily be achieved, look for dynamic poses, trace a basic outline of the models body, then free hand on the gear/weapons. That's what I did to create the piece I posted.) 3.) your execution of the piece is clean. You don't have any sloppy sketch marks, or smeared shading marks on the outside of the design. Many people will not clean there sketch lines and preferred an imperfect look. When it comes to perfecting an art form, this is usually frowned upon. That, coupled with artist who can't pick up their hands from smearing ink, truly cripple a nice design. All of your designs have clean white canvas, which is best to pop your design out. Muddied backgrounds will dull your focal objects. All in all, if you used larger, more unique and dynamic focal objects, the pieces would stand out a lot more. Creating a unique and custom piece will grasp the attention of the viewer, and keep them interested in the piece longer. (no on wants to get bored of looking at an art piece they spent money on.) Don't be afraid to step away from tracings and try to create an art piece that has a truly unique feeling to it. Keep practicing and drawing every day, it's the only way to improve. Always remember to stay humble and never let your ego bite you in the ass. (The posted image is a tattoo I did a hot minute ago, utilizing a unique focal object that's atleast 70% of the canvas size. Dinklebot is plain and dull in the image, but that was the desired look. Can't go misrepresenting him.)