Summer months off!!??? We had a couple of months off in between year 1 and 2 (did a bit of research)...could've used the moolah. But I vacationed, got out of dodge and had hellah time!! .
There was zero vacation any other time...and if I did, I certainly didn't want to work! I took the advice of some upper classmen and mellowed.
My theory was that I was soon entering residency, and that is a TON of work, so why bother?? Just for a couple of $$, not worth it. You have your whole life to work, and when you start residency you will work 100x's harder.
My point, well, I could have worked in between year 1 and 2 but other than that I found that i really enjoyed my time off!