Where eugenics is defined for the sake of this discussion as:
The use of genetic technologies that we possess or shall come to possess to enable parents to determine what genetic traits are passed on to their children, with the stated aims and goals of eliminating genetic disease, improving the human form (eg:restoring the human ability to synthesize our own vitamin C, should it prove possible to repair the damaged pseudogene), prolonging life, and improving the quality of human life.
Honestly, I'm kind of torn. The idea of being able to ensure my children would be entirely healthy and not ever have to endure some of the health conditions my family has faced (diabetes, heart disease, etc.) is a very nice thought. They're my kids, and I love them, and naturally want them to be healthy. But...on the other hand, people get sick, they die. It does happen, sad though it may be. And what would happen if people didn't get sick and die? We could end up with an even more grossly overpopulated planet.
And it starts with improving the quality of life...but where does it end? A prospective mom goes in intending nothing more than to ensure her baby won't get diabetes like the baby's grandmother and father did, and walks out having decided she's going to have a blue-eyed, blond-haired girl that will be 5'9" and be thin all her life, and with an IQ higher than Einstein's.
I recently read a book called Mount Dragon by Douglas Preston, I think it was. It was not about this specifically, but it was, in basic terms, about a research facility that was trying to alter a gene so that people would never get the flu again. I don't want to give away the entire plot to the book, in case someone on here hasn't read it and might want to, but suffice it to say, that things did not go well. And I kind of tend to think this might be the same thing: it starts out as a very well-intentioned goal, and the people doing it do it with the highest ethics and only the best ideas, but in the end, it will be warped.