My first milestone was a WW one, that they automatically set for me as part of my weight loss - 5% of my body weight to bring me down to 242 pounds, which I have since met (despite gaining and losing the same block of weight a few times!).
My second goal is 10% of my original body weight, which brings me down to 231 and is under the weight I married at, under my husband's weight, and over a 25 pound loss!
Third milestone is 210, which is about the weight I was when I moved out of my Mom's and started college.
After that, Onederland!
My next milestone is further away at 160, which is the lightest I ever was as a full grown adult, back in highschool. I was still overweight for my BMI, but I looked GOOD!
Ultimate goal right now is 140 or under, and while I cannot see myself that light I am sure it is possible for me. I think this also puts me in range for a normal BMI at my height, though not 'ideal' (that would be around 115, which seems unlikely on my mesomorphic, heavy boned frame).
While those are my milestones, I do award myself with a new hairtoy or piece of jewelry at every ten pound increment, so I feel like I am moving toward something. But these are my sentimental milestones