Call is a huge debate. Where Im at, there's weekend call ranging from q4-q8 for different sections like body, Neuro, chest and there's ER call shifts -12 hr day and 12 hr nights divided into junior plain film/us and senior CT/mr. Through 4 years, people will have about 8 months of ER, but all ER blocks are a month long each, and you work 15 days total in the month, your coresident does the other 15. So 4 months. Some residents and non ER section attendings have said that's too much, other residents say it's better than other programs where the call schedule/night float has it worse and that they learned more in the ER than reading inpatient followups on the weekday shift. So it's always a debate.
Intern years are also a debate. Some say Ty is the best because it's chiller, can customize your schedule to do a mix of medicine and surgery with lots of time off and again, Radiology will have an insanely steep learning curve- no amount of prep will get you ready before R1. For most people, not until you read a lot of imaging studies day in and out and discuss those cases with an attending and go to daily conference will you have a context to start learning from radprimer, core, and crack the core. I'm sure there's someone out there who will disagree and say it's worth studying intern year, radiology people are incredibly smart, and are able to memorize core radiology and crack the core physics during their TY.
Some say do surgery because you learn anatomy, but hours are rough, and most but not all will scut you out on the floor writing notes and doing social work and you never go to the OR and you never learn anything about relevant anatomy/being efficient/how to fully run a service from taking consults to doing procedures and taking care of them afterwards. Medicine prelim is guaranteed social work heavy and babysitting all the subspecialty's pts, but potentially not as bad hours and hopefully not as bad malignancy