Dunno... I'm 35 now, and I work in Germany. I think I have to work for at least another 30 years. (-.-)

The surgery and patient contact (speaking hours, visits) are really rewarding like you've said. But almost 30 percent or more of yoIur time (it really depends how high is your position) you're doing (not so rewarding) paperwork.. I hate paperwork. :D. It's a necessary evil, but I still hate it. I work in Germany and we have soooo many paperwork. Paperwork is the only work we can delay, so in the end of the long day (after 8-10 hours of "real" work), your exhausted body still have to finish the paperwork. I very often have to bring the work home because I just don't have the energy left to finish it in my hospital. And working at home is not "counted" as working hour...... If you don't like the work, it's really stupid to pick this line of work ʕ•ᴥ•ʔ.

I have heard that air traffic controller (the one in the tower, at least) works like pilot on the ground. Is that true? :D