The house a planet is situated in describes his focus but the signs he rules show the areas that are implicated as well and display the motives that drive his agenda.
Moon square Mars - short temper
Air - light, Earth - gravity, Fire - energy, Water - motion
Aquarius - extending out to others, looking for company of like-minded, Saturn colors this sign with qualities of detachment, objectivity and restraint; the focus is to distance oneself from the immediate and self-centered concerns; to be able to detach reason from emotion; uncomfortable with intimacy and too overt family bonds; the perceived boundaries of race, gender and religion mean very little to Aquarius; emphasis on structure and system
Saturn - harsh presence; in New Age talk: the universe’s version of tough love, taskmaster of the universe; loyalty, courage, resolve