I think that an interest in vascular surgery is comparable to an interest in any other surgical subspecialty (i.e. ENT, ophtho etc) especially since the development of integrated vascular programs. I also think that since these programs have started more medical school institutions are exposing students to vascular surgery or providing it as an optional elective.
I was first exposed to vascular surgery during my 3rd year general surgery clerkship as our general surgeons did most of the vascular work (at my home program we don't have a dedicated vascular division). I followed that up with an elective in vascular surgery at another institution. Between these two experiences and talking with other vascular surgeons as well as general surgery residents interested in vascular I got a good feel for the field.
My interest in vascular surgery is very similar to the reasons cited in the study presented by Stanford. It was a combination of the patient population that I would like to take care of and the operative and medical management that a vascular surgeon can utilize to help their patients. The endovascular cases, complex open vascular cases and the hybrid cases are fascinating for me.
I was interested in the integrated programs because I felt that the integrated vascular programs provide a well-rounded approach to vascular disease that you may or may not get in general surgery training or a vascular fellowship. Many places included a month of cardiology, hematology, and/or vascular medicine to provide residents with a comprehensive yet thorough understanding of vascular medicine. Their general surgery rotations were also arranged in a fashion that allowed residents to learn the appropriate skill set for vascular surgery. They included endocrine surgery (to learn neck dissection), GI surgery months (to learn the skills for operating in the abdomen and prepare for any complications that may be necessary during a vascular case i.e. small bowel resection). They also excluded other electives that would not be pertinent to vascular surgery practice in the future (i.e. ortho, urology that many surgery programs incorporate). I liked that it was a very intensive curriculum that was set up at many places.
However, do realize that no one has completed an integrated program as of yet. I have heard rumors that there have been some places that have had some attrition as residents have found out that vascular surgery is not for them. But also these are just rumors and I have nothing that confirms this.