I was on a P/F rotation system, so I took all the wildest, wackiest clerkships except the FDA who were a bunch of arrogant jerks at the time (and I confirmed that after I joined civil service). I was in a law office, got the DEA Field Office laboratory for one of my hospital rotations before Breaking Bad was a thing, had one of my community rotations at a hospice compounding facility, picked the faculty rotation that was reputed as the weirdo which secured my graduate admissions, got the INS (now ICE) processing facility in Eloy from the DEA Office by preceptor request and learned tropical medicine pharmacy and one of the places where chloramphenicol is used (and I didn't look Hispanic). I got my professional specialty from Cardinal, and being exposed to the quiet routine of the nuclear pharmacist day, and that really was where I changed my impression of being a chain pharmacist.
And then, I wanted to work Walgreens for the rest of my career, but ultimately did not because I got tapped for the NIH fellowship and never look back (as well as getting into the place I wanted to go). I did work for Walgreens at Deerfield in my summers during school and even well into my civil service career, so I don't consider that a closed door or regret.
I actually got my academic specialty because my original choice (pharmacoeconomics) was filled by prettier, more genial people, and informatics at the time was considered to be for the losers. While money can't buy happiness, it can buy beauty, and informatics is now quite exclusive for anyone who is a real one (hint: if you define informatics by a system, that is not an informatician).
When I give advice to the class, I would tell them to work anywhere else but the environment they interned in. Then again, none of my classes work anymore, so it's hard for me to give advice to people who have not worked at all....
Of all the rotations, I would recommend working the ICE/Border Patrol through BoP one most of all if I were Arizonan. It's a different idea that that when you do the work, you're put upon by management saying that you only need to give them enough days until ICEAir brings the detainees "home" across the border. I found that rotation to question my own sense of patient values and humanity. I still am not certain on how much I personify medical nemesis today. I know that my lifetime worst encounter with a patient in Walgreens is far ahead of a typical day in the detention facility where the horses for the mounted agents were treated better medicationwise than detainees.
Ivan Illich. Medical Nemesis. Chapter 1: The Epidemics of Modern Medicine