I'm 2+ years out (26 months since surgery), so take my words and utilize them as you wish. My weight loss phase was painfully slow. It took me 18 months to lose 100 pounds.
Nonetheless, I maintain my weight loss without tracking, dieting, counting, measuring, or restricting. I weigh 118 pounds and maintain on 2000+ calories daily, although I don't really track it. I'm also hypothyroid and insulin-resistant, but daily exercise has kept my metabolic rate boosted.
Here's the real deal...most of us weren't able to adhere to diets for the long haul prior to surgery, so why live like that after bariatric surgery? Dieting, counting calories, measuring food, tracking, and restricting intake are all aspects of the dieters' mentality that I refuse to partake in.
I am not on a diet. I eat freely, but stick mainly to lean protein because it is difficult to overeat protein regardless of your lack of restriction. We can eat 25 slices of toast (2500 calories) and never feel any restriction, or eat 2 chicken breasts (275 calories) and feel stuffed. It's all about wise choices at this point in the game.
My restriction has also lessened with the passage of time. I can eat 2 fast food double cheeseburgers in one sitting even though I choose not to. I can eat 2 extra large slices of pizza in one sitting even though I choose not to. The type of food we place in our mouths matters far more than the size of our sleeves or pouches.
Sliders, a.k.a. slurry foods (crackers, pretzels, popcorn, chips, bread, cookies) are the root of most peoples' regain problems. These foods turn into a liquid slurry in our digestive systems and you'll never feel full, so you can eat unlimited quantities of them. If you eat sliders, tread carefully and don't fall off the cliff.
You'll notice nobody ever says, "I am regaining after eating 100 grams of protein each day. I eat chicken thighs, steak, ground turkey, and hard-boiled eggs, but the weight gain won't stop." Protein has a high thermic effect; our bodies burn considerable calories digesting animal-based proteins.
Many of those who regain started incorporating slider foods into their diets. Unfortunately, sliders promote rapid weight gain since they 'slide' past the stomach into the intestines where the calories are stored as fat.
Good luck to you. Let me know if you have any specific questions.