You don't have to like it-you just have to eat it!

We sat down to dinner tonight and my daughter says, "I don't like this kind of cheese." I responded, "That's ok. You don't have to like it, you just have to eat it." She paused, looked at me and ate the pizza.  It made me think about how we are raising our kids in this day and age.  Are they under the belief that they do have to like everything? Where do we draw the line?

OK, I'm a martial artist so I guess I can be a little tough but the question remains, how many things in life do you HAVE to do as an adult that you DON'T enjoy?  I can name about 10 off the top of my head.  I don't like drinking water.  I don't like running on the treadmill.  Cleaning the house sucks.  Let me tell you how fun the laundry is!?
My daughter asks me to put chocolate in her milk and gives me a hard time when I give her water to drink.  So, how can we raise children who don't think that they must ENJOY everything?  How do we raise them to understand that life isn't easy...but it is rewarding if we try hard?
Children always want things that are pleasing to them...don't we all?! And of course we would rather have ice cream than brocolli if we have the choice.  But raising children to understand that we must do things we don't like is essential to building resiliancy and character.  What are some ways that you can teach your child to "get er done" when life hands them undesirable circumstances?