Primary care, psych, and (tele)rads come to mind. Hospitalist and EM may be able to make the right schedule work. There are the mommy/daddy track jobs in anesthesiology. Med spa/weight loss clinic. Anything non-surgical that’s outpatient based is the easiest.
Locums sounds nice but there are a lot of moving parts logistically, including you moving (travel).
You said time off for other ventures is your priority, so this is more for the crowd reading who is wondering the same thing. I’m going to sound old (I’m not) and cranky (I usually am), but going part time immediately significantly limits you professionally.
In addition to the obviously lower pay, there will be fewer jobs. Many part time jobs will want experience (as Mr. Smile alluded to). You are far more likely to slow down than to ramp up, so some employers will question your work ethic, fairly or unfairly. They will also question if you’re willing to deal with complexity, urgency, and possible call since you’re already unwilling to work full time. There will still always be opportunities, but they will be more limited.
If you’re in private practice but not around as much, it’s significantly harder to build. There’s a reason the first of the three A’s of medicine is availability.
And then we get to the hidden and more important part - you learn a ton in your first few years of practice in the real world. If you aren’t getting reps, you don’t hone your skills. There is a ton of growth in those years and you don’t want to stunt it.
So I get it, we’re only young/youngish once. There’s no requirement to make your job your life. *waves from lifestyle field* YMMV and everyone can and should try to do what will make them happy and fulfilled. But do keep in mind there are hurdles and trade offs if you decide not to work 1.0 FTE at least out of the gate.