Mercury

Mercury is where the souls go who do good deeds, but not for the sake of good deeds. Instead, they preform good deeds because they are ambitious and want the fame that comes along with being virtuous. These souls in life were lacking in the virtue of justice.
Mercury is filled with craters, and fluctuates wildy in temperature. It can be blisteringly hot during the day, and well below freezing cold at night. And, the day and night cycles very quickly.