Well, I don't know what to say. Rad Onc is truly an amazing field. Despite its competitiveness, I think I would also have a good shot at matching. It has a lot to offer.
But it's just not for me. There's something missing that I actually found in my first choice, pathology. I feel guilty because we all like to say how much we love helping patients when we enter medical school, but I found that patient contact just doesn't turn me on like I thought it would. I like people, but I think I prefer the science of medicine more. To each his own, I guess.
Funny thing is, I can think of many reasons in addition to the one prior why rad onc is so great. 1) no more colds, well child visits, medication refills, garbage inpatient admits. Each patient that comes in has a serious issue that needs careful planning and study. 2) the ingenious technological advances make for an exciting, dynamic field. I can't tell you how cool it is to read about gamma knife (although the book I read says it has not demonstrated a survival benefit) or proton beams (!!!!) and how they work. 3) the highly competitive nature of the field has resulted in a select pool of applicants, who are your future colleagues and the people who will be in charge of rad onc's future. The future is indeed bright. 4) Radiation works! It is so much more effective than I ever thought. 5) Sure it's taboo to talk about, but quality of life is a major issue in today's medical world. Want a well-rounded life? Rad onc has great flexibility, little call, and great compensation. You could arrange it so that you work hard 3-4 days a week and still earn a fantastic living, and it would be satisfying work (i.e. you wouldn't feel like a cop out).
Anyway, I have nothing to gain by saying that it's a great field. I'm not going to apply for it. I think, however, that every person, particularly those who love patient care, should do a rotation in it to see how great it is. For those of you surfing this board because you're curious about the field, I encourage you to try it out, or even just shadow a couple days (I picked up a lot of stuff just in four days so far).