I love my yoga. I actually have a mini routine that I do upon waking every morning, the stretching actually wakes me up.
Granted, I have a job where I'm easily moving and active most of the day. (Don't ask how many times I went up and down the portable stair case while reworkign a floor today, I lost count after 20 something
) and I do a resistance workout at least 4 afternoons a week. So for me, the yoga is an incorporated part of my work-out regime, not my whole routine.