I can't help but think we are all here because we are tired of dieting.....but what is needed after the op (which I am considering at the moment, 2 surgeons to see and chat to) is careful dietary habits after the surgery.
If you look at the document Tiff posted about the Sleeve Diet Guide, while you can still eat everything in time, you need to make careful decisions to maximise the efficiency of the operation, (and your money!!), but also for your health.
The 60% Protein will help to minimise hair loss (something I am petrified about!).
I don't think that learning about this stuff and having to calculate some things each day is too much to ask considering where it will get me in the future. If I had bothered to do that in the past I probably wouldn't be here now looking for such a drastic solution! And thats with a history of 21 yrs of battling with diets, yoyoing, and never reaching my goal. But in hindsight everything is so much easier!!