Do you have a history of gaining and dumping weight then? Or is this the first time you've gained unwanted weight and want to ditch it. Long term study's have proven time and again fad diets work initially to get the weight off but the rebound rates are so high its almost pointless unless you want to enter in to an unending cycle of gain a stone lose a stone.
This is the third time in the last 20 years. The other two times I did some diets that were in fashion and I lost what I needed within a couple of months and maintained for years (until the next major gain years later), so no issues with rebound. Happy to do them again but was thinking maybe there's something more exciting this time around.