Having not practiced Chen style Taijiquan, I am reluctant to say anything about that system. As you noted, in the Yangjia Michuan Taijiquan, most movements are back weighted. At most, 30% of the weight will travel forward during a fajin movement, though as little as 0% can move forward in application, depending on how close one's duifang is. Persoanlly, I have found this system very effective in both tuishou & sanshou as well as swordplay (jianfa). The reason for this is by remaining primarily on the back leg, one is (if I may borrow a term from fencing) able to make a very quick repost. That is one can deflect-strike in one smooth, quick movement all from the rear leg. This is much quicker than deflecting on the rear leg & then shifting the weight forward, into a bow posture, before the fajin. Though the Yangjia Michuan Taijiquan also uses the front leg when the duifang is out of distance for rear leg based strikes.Taiji Wuji wrote:How does YMT compare ... to the Chen Style? What are the advantages of the YMT style compared to others? ... the form looks like you keep the majority of the weight on one leg most, if not all of the time. Is this true in your push hands and San shou forms too?
The Yangjia Michuan Taijiquan system is complete, & includes everything from basic exercises that stretch & strengthen the body (including zhanzhuang), 14 Push Hands Exercises, the practice of free sanshou, right thru to a military style spear form. The YMT system does not include a sanshou form, these forms are from a later period.