Oh wow Quailing! That's really cool! I'm really glad you felt comfortable sharing that with us. I hope you flit around the forums a bit and find a nitch here. Welcome!
My personal favorite hangout is the 100 pound club. You should check it out.
I'm guessing there will be little comparison between this and BL. I like BL but it's set up for drama and it takes place in an artificial environment. You can't NOT lose weight on TBL. With a show like Heavy, it seems to me there will be the ever present possibility that the person documented will not be successful.
My only hope is that this show breaks down stereo types rather than make them stronger. One thing I HATE to see in shows I've seen in the past is the camera in the person's face while they eat, focusing on the breathing, if I described that right. The microphone picks up way more obnoxious sounds than you would ever hear sitting right next to the person at the dinner table. That's a big pet peeve of mine. It's makes the eating disgusting instead of a natural and necessary part of life.