Why isn't Yoga for you?

It's something I have been contemplating about for a while. Yoga as a lifestyle. Not just for a stretch session in between cardio workouts but really immersing myself into this ancient practice to get a slice of all the hyped up benefits it offers. My experience has been somewhere in the middle of someone who can't say they've never done it but can neither carry a conversation about it other than 'it's good for you'.