hey blue, before you develope you own style it may be better to get to grips with the basics first, that is to find a tutorial go through it and end up with something at the end
Clicky for linkageif you'd like to go for it youself, do put some effort into it and spend some time on you piece, go get a reference of something you'd like to pixel and knock yourself out, google image search is always goof for references lol
wat you've got so far doesn't really resemble anything, it might be better to tell us what they are then maybe we can crit them, they're heavily pillow shaded which is a no go (pillow shading is making you the light source, so the edges get darker), if you want to pixel people and gore (the far left picture) you need to address some anatomical issues within the image
so overall, get a reference and have a go pixelling it, start small and work on a background that compliments the image, not grey.