@paulczege Out of curiosity, would these be single icons for the concept or groups of icons? I can think of a few humorous things that would count, like "inexperience" being something like a figure marveling at a big, shining "OLD!" much as you'd expect for a "NEW!" That said, I don't think I'd be comfortable doing anything but offering concepts since I'm a pixel artist and not sure of the style you're going for.