You know what's the hardest thing to design? Monsters. Here's all three versions of an Insect Monster that I've cut from Direct System Mod.
Also, here's how one of my enemy sprites have evolved over the years.
Left being the oldest.
![Posted Image](http://puu.sh/xUMV2/8d2d477d16.png)
Hopefully they look good now.
Learning the right rendering, texture, modeling and lighting technique was/is one hell of a road. Hell, even the poses are incredibly important when working on a new enemies. You can't have 'em stand straight or they look absolutely horrible in-game and etc.