I'm still a big fan of Atkins, because I'm lazy.
My worst has been 230 and doing Atkins is a no brainer, protien good, carbs bad. More importantly I did the research on it and it IS a healthy diet for most people.
Its downside is boredom with the same foods, unless you really go out of your way. Even bacon gets old, the horror of that thought.
Basicly I'll get up to 230, start thinking I look fat (most people will guess I am at 200 so I have that going for me but I can tell) I then will get down to between 212-220. I'll go off atkins for a while and crawl back up since I will eat pretty poorly.
What I need to do is get my lazy ass to the gym, but I just can't mentally justify it. It sounds like a great idea at 8am when I start my day, but by 5pm I just want to go home and veg out.
Oh for the good old days when the motivation for being in shape was getting laid. Ok they maybe weren't so good, but at least I was in better shape