Nico,
I still think internal medicine is the easiest of specialties. You're essentially the triage person before most patients go off to see specialists. Not to mention that it is also the easiest specialty to get into with only 8% of USA med school graduates going that route due to the low pay (national average starting pay for a hospitalist or internist is at 150k). Do you have to keep up with new trends and emerging disease processes? Sure, but half the time you refer them to a specialist anyway. Hence, why I assume you followed the nephro route.
Regarding education, I did pre-med prior to business, graduated top of my class, took the mcats (got a 38) and got accepted to all city/state schools, as well as 3 out of the 4 privates I applied to. That part wasn't all that difficult. I left that route to go do business, because I realized early on that you can make 3-5x as much as a doctor, without the intense responsibilities. Top that off with the fact that you have thousands of Caribbean led school grads flooding the internal medicine residencies and I think you can imagine why I call it the easiest.
General surgery might be a dying breed, but that's because most if not all surgeons go off to do a speciality after the 5 year general surgery residency. It's like asking an MD to just do internal medicine and forget about a more lucrative and exciting speciality after that 3 year residency.
Just my opinion though,
"1"