I recently read a NYT piece called, "Why Would Anyone Choose to Become a Doctor?" by Dr. Danielle Ofri. It's a sweet essay written by a physician who describes being perplexed by the large number of medical school applicants yearly, considering her profession's numerous annoyances.
As the author considers alternatives to her career, however, she comes to the conclusion that her clinical encounters make it all worthwhile. The essay is a nice pick-me-up.