I feel pretty inspired to write music today, however I won't be by a piano for the whole day :P I guess I just have to keep that motivation going for tomorrow.  I'm in no particular mood right now, just pretty content.  Usually if I'm inspired to write a song I'm in some kind of mood and feeling some kind of strong emotion.  For examples my song "Poisonous Touch" is one that I felt complete rage while writing it haha.  Sometimes  its difficult to write when you are in such a state because the emotion almost takes over you at the moment.  Its a fine balance between writing what you want to write about and making it too crazy that it doesn't make sense.
Here's the link to Poisonous Touch  http://www.youtube.com/watch?v=-F8MpykwyBU