so bombin' to find more people that do ballpoint pen stuff, first of all.
secondly...dang. your shading is off the charts. i'm not 100% sure what's going on, but who cares, it looks really great. surrealism? probably.
i think maybe in the future, if you wanted to make things stand out more, let the paper show through the lines? like, let more highlights happen. i'm a victim of going overboard on the shading too though so :P
also, i don't know where the light source is on the ball things. on one it seems like the light source is from the bottom, but on the one right below it, there's light coming from the top.
i know pen stuff is really hard though, so don't worry about it too much, just when you're drawing, try to kep in mind a light source. what i do is very very lightly draw little lines showing where the light would hit from the source, ie if it's the sun, draw very light lines from the rays (or you could use a pencil for this bit) to show where the light would hit, then draw over it later.
it still looks phenomenal, though. like i said, pen is really hard but it's nice to find more people that do things with it. i really like your art. *_*