The Bikram sounds challenging! I’ve been enjoying reading your accounts of it. Like Joe, I practice Iyengar yoga, which emphasizes precision, varied and creative sequencing, and duration (poses are held for relatively extended periods of time). The attention to detail sparks lots of those eureka moments you mention, KF: tucking the tailbone under, for example, gives you greater control in coming out of a headstand; transfering weight from the palms to the fingers gives the forearms a lift in downward facing dog; pressing the inner feet down firmly lets the thighs take on more of the work in bridge pose–that sort of thing. I absolutely love it. I’d be really interested in trying out other styles for comparative purposes. Bikram sounds exhilirating.