I recently applied to university to read International Relations and Arabic. This was a U-turn from Medicine, which I had wanted to apply for only weeks previously... I went through the whole process, so you don't have to.
1. It's not like on TV
2. 7 years is actually a really long time
3. You don't really know where you'll end up
4. You're a doctor and that's it
5. It's so competitive
6. You have to care about people. Like, really care.
7. You're tested constantly throughout your career
8. You'll have to work shifts at times you never thought existed
9. The constant paperwork
10. Patients will die and there's nothing you can do about it
Sometimes you can't save someone, obviously. But having to tell families, coping yourself.. it would be too much for me, and for a lot of people. It truly takes an empathetic and understanding person to deliver such bad news and it must make you feel terrible.