I definitely have muses and they are what inspire me to write and keep going at times when I don't want to because of a situation game-wise. Like jasin mentioned my muses have a voice. Sometimes it's loud and other times it's 'normal'. I think I'd be lost without my muses. They keep me focused and let me know whether or not I like playing/writing a particular character. If that voice isn't there, then I'm not going to write said character. I have to feel them and know that I can draw inspiration from them.