Do you like working with psych patients? I love it, I love working on the problems they have (vs DM, CHF, COPD, pancreatitis, ACS ruleouts, etc). I have done outpatient, inpatient, acute care, C/L, and private rotations, I know the different settings I could work in and got experience with pain, eating disorders, sleep, forensics, and ECT. I could see myself doing any or all of them during my career at various points . I'm still new to this (just finishing fellowship), but it seems like that's a key factor for continuing to like this field. Most doctors don't, which is why they don't do what we do and would probably be miserable in spite of our more friendly work/life balance.
Also, in your post above, you mentioned "drastic changes." True, they can happen, but psychiatry is one of those chronic care types of specialities where drastic changes happen with some patients, but for lots of our patients, small changes or just maintaining are closer to their reality. Fine with me, the relationships can be rewarding, some patients are frustrating and it's just an agonizing 15-30 minutes but that's true everywhere. Treatments that we have so far for severe mental illnesses are severely lacking, and that can be disheartening if you're really looking for those drastic improvements.
I started my residency with someone who was very undecided about psych and was thinking about surgical specialties beforehand. She wound up transferring to internal medicine and was much happier. Lots of people wind up transferring from fields like anesthesia and surgery to psych, though, and are happier here. So, rambling, but I guess the good news is that whatever you decide, you can switch fields if it's really not right. ENT and anesthesia do sound very different from psych, Yeah my backup is ENT as I just liked anesthesia intellectually, but hated not talking to my patientsthough, so I am wondering what the appeal of psych is. Just liking the people you work with in psychiatry isn't enough.