I personally don't see any reason to enroll in graduate school or a post-bacc if your undergrad GPA is great. If you have a special desire to earn an MPH or MBA or whatever, then sure, I can see the point. But just to kill time, I wouldn't do it. I took two years off, and I kept myself insanely busy. I taught sixth grade life science, continued my undergrad research going on to publishing & presenting it at a conference, volunteering at the American Cancer Society, studying for the MCAT, getting EMT certified, traveling, & shadowing. At my last job, I got promoted to clinical supervisor, and now I'm working full-time at a cardiology practice. (This was clearly not all at the same time, but even still my two years off were packed.) The point is that if you can and want to take that year off, use it to your advantage by exploring non-academic opportunities you were unable to pursue during undergrad. That way, you prove yourself academically and clinically. Plus, it's lots of fun. BTW, in my interviews, I never got questioned on my time off. Instead, they really, really liked that I took time off & got involved in other activities.