I just did my BMI for the first time and while I am no longer "morbidly obese" (39.8) I am still severely obese and, doing the numbers, will remain so for quite some time.
This sucks. The smaller weight goals are much easier to focus on so I will be focusing on weight from now and not BMI.
Saying that, I punched in some numbers pretending I was a six-footer and BMI looked much more favorable.
So, if you're tall BMI is the way to go for a little bit of motivation.
For the shorties, avoid.