Personally I like the straight lines and angles in your house and I think your current pathway works. However I would break up the lines by adding two small Italian cypresses at the front corners that are taller than the bottom part of of the boxed out part of your house. This will echo the tall entry way.Around it I would add a series of rounded boxwood plants (or other plants that have been tailored into round balls of differing sizes. These would be grouped behind the cypress to create groupings. I would then fill the gravel area with liriope which is also dark green short leaves to add movement and continue the dark colour to anchor the ground.The pavings could do with being changed out.This still leaves you with a super lawn and a wonderful sakura(?) cherry tree for spring blossoms