To me, it’s very situational. Back-in, head-in, pull through a space, I do all of the above at different times. It depends on several factors: how full a parking lot is, how wide or narrow the spaces are, if the spaces are diagonal or straight, if a sign mandates the direction of parking, if I’m in a hurry arriving or know I’ll need to leave quickly, if I need access to my trunk to load groceries or other cargo, if it’s snowy/icy and I’m driving my front-wheel-drive vehicle vs. my 4-wheel-drive, etc.
I do often back into our driveway, but not always. DH calls it “getaway position”. Backup cameras are very helpful, yet I still always check mirrors and turn to look over my shoulder when backing up. That’s how I learned to drive decades ago, and it is also still required on my state’s road test (you cannot rely solely on a backup camera). And obviously you must be extra careful and cognizant of any children or pedestrians that may be present.