absolutely. usually the mood i'm already in chooses the writing form, but sometimes I can control my mood by picking a style and trying to bring it in to being. Its easier to write based on my current mood, however, as writing that is dwelled upon or even forced just feels fake to me. But if I'm really down, sometimes its the best way to cheer myself up a bit. If I'm feeling overly spiritual, I tend to write more poetry. If I am feeling determined or ambitious, I write longer pieces. Short stories tend to be when I'm a little more down, and snippets or basically just thirty second frames of time are when I'm a little more lost.