i think the heart piece is your strongest. it would be cool to really play off of that...find an old medical book and do collages with the heart diagrams. or maybe a second piece like the first, but make the heart look more like the organ. they would look cool next to each other. i might recommend staying away from watery greys in your pieces. they can make them muddy and not stand out. try and use alternative colors such as a deep cobalt blue mixed with a little burnt sienna and a titch of alizarin chrimson. that makes a beautiful rich color which can be used to substitute just a plain ol' black. so yeah. sorry, i'm rambling. yargh.
ps- just as a suggestion, when practicing cross hatching, use just a plain ol' blue or black pen. (the kind you can steal from 711 or out of your mum's purse. heh) they work nice because the line is much softer and easier to "correct" where as a "waterey" thick ball point pen or sharpie can become difficult to make a gradient from dark to light. does that make sense? i'm really bad at putting things into words....dar.
nice work! i like how you have such a variety.don't ever stop experimenting. i think you should try and develope your cross hatching further. you seem to have a nack for it....keep it up! it took me 5 years to learn how to do it! but now, i don't even use pencil at all. i definetly prefer to use pen and just focus on line. its super fun!
very nice- i understand more than you know! i would maybe recommend developing the background further. it would really help pop the picture out. i would keep it simple so it doesn't distract from the subject. maybe just a rich dark that fades to a lighter tone? i dunno. post more!
i really enjoyed your piece! it's very unique in both color and subject! one thing i would recommend would be to create a focal point of interest- that will really help the eye be drawn in and find direction.find a point you can really develope, and i think you would be suprised by how much of a difference it would make. you should try acrylic on wood and cardboard- its really fun! there is nothing better than painting on found objects *glee*