A door makes a great canvas for the budding artist in you...
Here are some examples that may help you get inspired.
Make your doors an art statement...people will forget that they are actually functioning doors.
Description of doors in order of appearance on page:
off rectangular colour blocking on a standard masonite door.
Standard sliding closet doors made to resemble riveted metal.
This is actually a folding bi-fold door...but you cannot tell, can you? The art has been incorporated into the design so that the fold line in the middle becomes invisible.