Stability.
My mother moved us back and forth between Dallas and Louisiana practically every year and then back to Dallas permanantly just when I was to the point that I REALLY wanted to stay in Louisiana. I feel that I would have finished high school there and that has been the one thing that has made me the most bitter over the years. On the flip side of that, I don't know that my life would be what it is now if that had been the case and if not meeting my husband would have been a consequence, I think I can manage to get over it.
Just a "do over" on life. You know, that whole, if I only knew then what I know now concept? What I wouldn't give for a do over... now that's a hard pill to swallow.
My Dad back. He died when I was seventeen (aortic aneurism). It's hard to suddenly learn to live without your best friend when you're that age, and it still hurts fifteen years later because I can't share my joys, pains, and successes with him.