Oh, I'm a dentist's dream, too. I have never had any cavities and therefore no fillings or traditional crowns, and I was genetically blessed with good, hardy teeth... well, except for the ones that didn't ever make an appearance  I have congenitally missing adult upper laterals (the teeth between front teeth and canines) and I have had a dentist, cosmetic dentist, dental surgeon, and periodontist all on call over the years at various stages. I do have dental implants, but the left implant crown doesn't like to stay cemented to its post, so I have to go in once or twice a year when it feels loose to get it sandblasted and stuck back on.

Teeth are so glamorous, aren't they?

ETA: forgot to include my long-suffering orthodontist in the list, who dutifully followed instructions to torque my front teeth this way and that during three different braces-wearing experiments in order to move a root out of the way of the "overhead space" needed for the implants. Ugh.

One thing I got very lucky about was having straight teeth.  Just that one thing, dentally speaking.  When I was in elementary school I got cavities like they were going out of style.  I even had an abscessed tooth when I was 8.  It had to be pulled, the area was cleaned and closed, and then a spacer was put in because my adult tooth was a long way from ready.  

I never really have new cavities anymore.  My dental issues come from old fillings breaking down or getting loose.  I do have some small "spots" that my dentist is watching, but so far so good.  Not to sound like a hippy, but lately I make my own toothpaste that is supposed to heal the spots and remineralize the teeth.

One of my children had to take a cardiac medicine for 10 years.  It is common knowledge among mothers that their heart children have dental problems.  Dentists even mention that the cardiac meds sometimes cause problems.  Cardiologists don't seem to think it does.  Anyway, my heart child has had several issues and he has an adult tooth that formed with no enamel.  None.  He is 13 years old and the next time that tooth needs work he will need a root canal and a crown.