Mars ( planet of vitality) is strongest when placed in a fire sign. Since fire indicates passion, and impulse, Mars is most definitely more comfortable expressing itself through these signs. Mars in fire signs.
Mars in Aries
Aries (the ram) is at home here. Mars is the god of war and Aries is the cardinal beginning of the new year, representing a spring to action. Mars placed here will be full of vitality as well as direct and assertive not usually initiating new ventures with much tact, but acting on intuition and impulse which is pretty good for the most part. Might be quite the athlete with this mars as well.Negatively, they can be inconsiderate and overbearing lacking patience and tact .
Mars in Leo people are usually very passionate, opinionated, and full of pride. They really want to be respected, so they will pursue ventures ardently and with unwavering will power (fixed). With the roar of the lion and power of the sun in them, you can expect to see them out ahead of the pack leading the way, rather than trailing behind. They can be generous and fun with the ones they truly love. Negatively, extreme egocentricity and ignorance to others opinions or advice, as they tend to think their way is always the best.[/indeed-social-locker]
Mars in Sagittarius
Mars in Sagittarius gives the native the expansive all or nothing powers of thor (jupiter) to accomplish many different tasks (mutable). They are honest and direct people who will tell you their honest opinion to your face. Winning a debate may prove to be futile because they will out shout you if they can’t win on facts. Thank goodness they like to have fun doing a plethora of things and doing them with passion (even if they don’t finish them). Due to their mutable nature there can be some inconsistency to them. Sometimes they will be very vigorous other times pretty subdued. Negatively, they can be inattentive to detail resulting in injuries, and reckless as well as take criticism very personally and fire back with hurtful barbs.