I have not had one, and don't plan on it, unless medical need arises. I didn't have one with my first pregnancy, either. I have had doppler, however.
I'm pretty comfortable with our decision, and have never really fully understood the need to see (if I had this need, I would act on it, though. I think u/s are probably overdone, but I am skeptical that they are as harmful as some think. I would personally prefer more evidence that they are safe before having one, however).
It is funny how shocked strangers get if you mention not having had one. I just think this is odd, considering how relatively new they are.