I'm about to get tested on my ability to give a proper physical exam- all the doctoring stuff that I've always thought was so cool. Looking in people's ears, and eyes, taking their blood pressures, etc.
There's something very comforting about examining. You can't tell if someone has a heart murmur unless you listen for it. You can't diagnose a kid's ear infection without checking his ears. So, in some ways, doing a thorough physical exam (for me, at least) is the most important part of this whole "doctor" gig. Plus, it's fun.
You can know all the anatomy, biochem, and physiology in the world but it'll never be helpful in a void. Physical exam is the link between all the stuff we're supposed to know, and finding out that someone actually has it. Wish me luck!