I also am studying medicine...and ancient history. I'm the MD-PhD student who doesn't work in a lab (though I've done that for a bit, too).
Since Myers-Briggs appears to be curiously popular at the moment, I'll add that two of my four 'letters' are evenly split 50-50. Does that make me 50% 50-50? I'm not sure...but it does mean that I get along with everyone and equally enjoy going out with big groups of friends and staying in and spending time with one or two friends, and that I think with both my head and with my heart.
Other factoids...favorite travel experiences include spending the night camping in the Roman archaeological city of Ostia, stargazing in the Australian outback, the Hermitage in St. Petersburg, riding an elephant in Chiang Mai, an overnight climb up Mt. Fuji, and hanging out in Japanese onsen and Hungarian baths.