A while ago I designed some icons for a website. Unfortunately this site never got off the ground so I wanted to showcase my work. The challenge I was presented with was coming up with an icon set for Green Gear Heads. The idea behind this site is that it would be an online community for GearHeads (gearhead: A person who is interested in machines and mechanical objects, i.e. cars, motorcycles, etc.) to post on different types of green powered vehicles. The main premise being that one could document an entire conversion project for different vehicles, such as converting a gas car to electric. Almost like a wikipedia for conversion projects. Anyway, I think the icons turned out really well.
And just for fun, I turned them into superheroes… 
I like the concept. I liked how you used the same face on all the different icons. Each icon has its own distinct characteristics. I would watch these superheros in action.