For all the promises of qigong and tai chi, I can't think of a single qigong master that radiates good health and vitality.    They usually have sallow, pinched features, or have dark auras. Many of them are also overweight or look in poor health. There is a lot of yin chi, and the most powerful among them inspire fear rather than radiate the warmth of compassion.    By contrast, when I look at people who practice yoga regularly, they have abundant qi, a glowing complexion and open expressions. Similarly, when I am in the presence of a Buddhist master I feel so comfortable, like I am with a member of close family.   I'm probably going to get roasted for this, but I am not just being a troll. I'm genuinely interested if others feel the same, and what the reason might be.