beachbrat: Yep, right around 20 years ago I was doing the same thing. I lived at home with my Grandparents. Rent free, Grandma did my laundry, and cooked, and did everything except clean my room.
It was a phase that lasted about a year and a half until I decided I wanted to go to grow up and go to school. My Grandparents were soooo pleased. But they were also really tolerant of the phase that I had went through. I'm not sure if it's because I was their favorite grandbaby or because they had 6 kids and they figured it's just part of being young and stupid and growing up. They let me make my own mistakes and learn from this during this phase too. I learned quite a few lessons, believe me.
Now, my Grandparents have both gone to heaven and I have children of my own, but when my son was about 8 weeks old my Grandma was holding him and rocking him and I'll never forget that she told me this, "Love your children for WHO they are, NOT for who YOU WANT them to be". That statement has stuck in my head forever. He's now a 12 year old happy go lucky kid, who has the best sense of humor and is the most caring kid I know. I attribute that to the fact that I've raised him like that and will continue to do so. He's a pretty neat kid because of it. And I'm doing the same with my 3 year old daughter who is the spitting image of my Grandmother.