Exactly what Cubsfan10 and <3 rads said. I always enjoyed patient interaction as well and plenty of attendings, fellow, and residents told me I would be a stellar internist if I stuck with IM, but alas, I still had my mind made up for radiology. All the BS and red tape that comes with patient care can be exhausting, and I especially didn't like dealing with disposition issues even though I was fairly good at it.
Perhaps, contrary to popular belief, radiology does need people skills as you're dealing with physicians and other clinicians throughout the day, and when you're doing procedures on patients, it is ideal to build rapport quickly as these patients are, many times, a little nervous.
Also, depending on how the reading room is set up, you're hanging out with your radiologist colleagues, so if you're with a cool bunch, it can be a pretty fun time.