Five Styles of Tai Chi
T'ai Chi (Taijiquan in pinyin or t'ai chi chuan in Wade-Giles) has five styles:
Sun is the youngest style: about 200 years old. It focuses on inner energy movement called Neigong and uses small steps in a circle. Bagua is a Sun technique.
Wu is slow and uses a forward leaning stance
Wu Yuxiang or Wu Hao has small , tight movements. The hands are never crossed and do not stretch beyond your toes.
Yang is slow and has circular movements. It's the most popular and best known style in the West. It is used for health and as moving meditation.
Chen is the oldest Tai Chi style: about 400 years old. It uses slow/ fast (yin/yang) moves with kicks, jumps and punches. I think it is the best fighting style of the five because it is dynamic. You use the energy and momentum from your opponent to defeat him therefore you don't have to be big or strong to do it like in some other martial arts forms.
I learned this style from my uncle.