Interesting. When writing music, I believe that it is very important to draw outside influence, rather than listening to bands which play the same type of music you are playing. It helps to bring something new to the table, as well as keep you from indirectly taking riffs from someone else's work. For instance, when I write my music, I do it with middle-eastern folk in mind, or very bombastic orchestra music.
In fact, I want to incorporate orchestra music somewhat into what I am doing now, but I sadly have no keyboard player.