I agree that it's inevitable you'll disappoint your parents, somehow. I know my mother never really let go of her plans for me to be her Mini-me, even though I had no desire to do so and was not shy about letting her know that.

Not wanting to have too many expectations of who our kids would be was one reason we opted not to find out the sex of our babies before birth. And seeing who they actually became over time was one of the fun parts of parenthood for us! That may not be common, but I'm glad that's how it was for us. :)