It helps to think in terms of finding a happy life, not a happy size. If you put size first, nobody's going to be happy. I think in terms of how I want to live/feel. I want to be lean, fit, healthy, happy, strong, confident, peaceful. I want to eat pizza for breakfast. I want to bake. I want to eat out. I want to exercise (translation: play) every day. I want to be strong mentally and physically. I want to feed and build my muscles so that they'll stick around and help me to be a bad ass old person. I want to become more flexible mentally and physically so that I'm both very bendy and able to easily change direction and let go of things that bother me. I want radiant good health, and I want to eat and think in ways that support it (yes to nourishment and fun, no to fear and punishment).
I see myself as a fit circus ninja baker adventurer. I behave in ways that support that vision of myself. It's so much more complex than picking a number and doing some restrictive crap to stay there. My happy life occurs at about 20 pounds heavier than my lowest adult weight. It's also about 20 pounds lighter than my highest adult weight. This is a weight / body composition / food intake / activity level that my body picked out. It tells me what's ideal and sustainable, I don't tell it anymore. I run us into the ditch every time I start picking numbers.