Well, I always wanted to be a Broadway actress. Now that I have a kid I realize that's a little unrealistic.. I would like to be an actor that is able to make her living doing theatre/voice over/commercial/film work, etc.
But my biggest dream now is to be the best Mom I can possibly be for my Son and to see all of his dreams come true.
That last bit is a wonderful dream, and I think that just having it means that you have a pretty good shot of making it come true. And good luck with the first bit -- somebody gets to do that stuff, so it might as well be you!