As a MS3 I remember going from two months of surgery, where we worked 12-16 hours a day doing some crazy stuff along with bread and butter while having a blast. It just felt so good to tangibly fix a problem. Then I went to IM...
Best way to summarize my experience:
Surgery is 16 hours of work crammed into a 12 hour day.
IM is 3 hours of work crammed into a 12 hour day.
I have NEVER been more bored in my entire life.
PS - Credit to OP for actually using the search function. That's moxie baby. Get some.