Personally, I had several. I had some easy, more difficult, almost absurd, and dream.
When I was 370, my goals were, 300 for the "easy", 275 for the "more difficult", 250 for the "almost absurd" and 200 for the "Dream". This was when I had the lapband installed. I hit 300. Then I couldn't go any farther, floated up and down from 300 - 320. The revision to the bypass helped me clear all the rest of my goals and now I'm a stones throw from 200. So, the take away, don't be afraid to dream big, just make sure you understand that dream goals might never happen. Set yourself a few goals, that way when you start ticking them off, you won't be frustrated trying to get to JUST that one, crazy, dream goal. And don't forget to celebrate each and every victory with the same level that you would beat yourself up for each failure, it's only fair to be equal!