Both my Mum and my Dad are overweight...my Mum used to weigh 27 stone (believe it or not!), but in one year, she managed to drop 14 stone through Slimming World-- I'm so proud of her.
The only downer is that because she's managed to lose weight, she's VERY controlling over what I eat. I'm a normal healthy weight, but if I gain like, a pound or something, she gets really agitated and starts nagging me that i wouldn't want to be heading to Uni overweight like she was when she was my age.
So...yeah.