58.5 year old male, 6 feet tall, went from 258 to 198. I move within a range - as low as 194, high as 212 - heavier in the winter, lighter in the summer.
Our approach -
My wife joined me (she lost 20), and is also maintaining it - we each have our favorite person as our support system.
We don't call it a diet - we considered it a permanent lifestyle change.
There are no off limit foods - just portion control and awareness of what we are eating and the caloric content
We took it off by joining Weight Watchers - that taught us how to count "points" and track it. I still do.
We increased our activity - the dogs get a minimum one mile walk per day...often longer.
I have kept a food log since mid 2011 - at the end of the day I just open a Google calendar entry and write down everything I ate and count it up in WW points - my goal is 30-40 points per day (1500-2000 calories, roughly).
I've not had a soft drink of any kind in 7 years - morning coffee, all other meals water - unless we have wine or beer.
Beer or wine limited to 2 days per week, and we either split a beer or have a small glass of wine for each of those two events.
Weekly weigh ins on the Wii that we have.
It sounds complicated, but it is our lifestyle now - it is easy. We both like to cook, and it is mostly fruit, veggies, grains, legumes - some seafood, very little meat.
We love the way we eat - and we always look forward to our meals, and they always taste great.
The big bonus was to my knees - I've got 2 torn ACLs - at 258, I didn't move around well at all, and thought knee replacements were imminent. Now, they feel really good...probably at least 5-10 years until the replacement.