Don't let one teacher ruin yoga for me. I do yoga at a big box gym and luckily there's an instructor that is a former athlete and focuses more on that kind of thing rather than the spiritual stuff. There was a substitute one time who had us rub our hands together and then put our palms to our face to "absorb" the energy. I'm not spiritual at all and if that was my first experience, I wouldn't have ever done it again. On the flip side, if you are spiritual and are into meditating, you probably wouldn't like the teacher I go to.