I like some of it, although there is a lot to be improved here: thin your paints, the layer is far too thick. Less inks, and more careful use of them, I can see pools and smears of it all over the model. Differentiale you ink choice - you have the same brown shading everywhere, making the models look messy. Shade metal with black, blue with dark blue, yellow with light brown, green with dark green etc. Finally, improve your fotography: monochrome background, and take each model individually. Good luck.