Your "ideal" weight depends on your body type-build, genetics, etc. Everyone is different, but eventually you will get to a place where you can be happy with yourself.

For instance, I am a middle-aged lady, 5'11" tall with very small bones. My supposed ideal weight can be anything from -170. Right now I'm really happy to be hovering between 155-160. It's a realistic weight for me to maintain in the long haul-hope that helps...