posemaniacs for DAYS yes good
your use of lines has definitely improved over time, and that's fantastic. i would consider doing more value studies with simple and medium-complex shapes.
your sense of perspective and space show in your mechanical drawings. i can't wait to see where those go in the future! you seem to have a knack for integrating mechanics and cybernetics into human poses and characters. keep that up! i think that's your best strength as of now
also: MORE LINES. more lines in your sketches, especially your quick poses. fast, fluid, energetic. save the precise outlines for longer studies.