This is a nice idea. I don't know if I'll do a bunch of rewards, though my grandmother did a charm bracelet when she lost a bunch of weight. That kind of appeals to me. I might do that.
I do have a couple of milestones in mind, though:
when I hit 250 lbs - get myself a bike (or maybe I will wait until 220 and get myself a folding bike!)
and then I train on that bike until I can do one of those bike tours around another country!
no specific weight, but surely by next summer - go kayaking at the local kayak rental place because my butt won't be too big anymore
somewhere under 200 - actually go to that other country
Hmm. I feel like there were other things I wanted to do that had weight limits attached. (Like maybe going on a hot air balloon ride or a zipline/ropes course. Then again, even at a lower weight, I'll still be a chicken.) Honestly, though? At 250, I think I'll be able to do almost everything I want to, except for being able to fold up a bike. Any loss beyond that is just ... some non-food metaphor that means "super great and very welcome, but not strictly necessary."
I might need to lose a bit more than that to feel really comfortable going to an amusement park, say, but that's usually more about size than weight. (I Googled, and Cedar Point has 1-2 adult rides with a weight limit of 220; most rides with limits are much higher.)
If I ever want to go snowshoeing, weighing less would be super helpful, to get women's snowshoes. ?
But, yeah. Maybe a bracelet charm every 10 pounds. That seems really nice.