So I have this sketchbook, about 21 x 15 cm, I always carry it with me because it's portable and I never know when will inspiration hit me. I like to draw with 0,3 and 0,5 liner and sometimes I would add some volume with gray markers.
I'm a fan of cyberpunk, because it gives your creativity much more freedom, therefore you can never get too far on imagination with this kind of genre... and because it's cool.