I remember my grandmother used to have these ugly blue and white Victorian dishes. They were very old, some had cracks, and most of the time they never matched. They were far from perfect, but I would do anything to eat off those plates right now just because they were hers...
Does everything in your house match? Mix up patterns, add some color, mix old and new, eat off the dishes you love. Who cares if it matches the tablecloth or the paint on the walls? Make your space about you! It's those simple little things that make your house feel like home. :)