Fitted more loosely, flagstone pathways complement all other styles and sizes of homes and yards. It's preferred by professionals to use limestone and sandstone for pathways in shady areas, where the lighter hues (a gradation or variety of a color) of the stone make the pathway more visible (usually in the evening).
In hot, sunny areas, the darker tones of slate and granite create a cooling effect. Direct sunlight will also cause the rich and varied colors of granite and quartzite to sparkle and shine. If you like color and brightness in a garden, you might want to consider trying these types of stones.
Flagstone is sturdy whether set in mortar or not. Even the heaviest wheelbarrow loads or lawn equipment traffic will not mar or damage a properly installed flagstone path.