Everyone probably realizes this but BMI certainly isn't too useful for active people. I'm 200lbs, 5'10" and about 17% BF. Which means I'm not extremely lean but don't look fat, despite than I think I'm within 5lbs of being obese. I've got friends who weigh 30lbs less and can grab more fat off their midsection than I can thanks to me having a thick frame and a bit of muscle from 2 years of heavy weight training.