My main ambition of going to Cambridge to study physics has worked out, but I had a lot of other part-goals that never got fulfilled. When I was younger, I would try several different sports out, including tennis, badminton and cricket, and I did enjoy them and vaguely wanted to become good, but they ended up going nowhere. Also chess, a game that I still play but not nearly enough -- while I was a fairly promising junior, University got in the way, even though it shouldn't have really.
So the main ambition has worked out, but quite a few other things fell by the wayside. Oh well.