Depends on your goals really
Push, pull, legs can work alright but once a week may not be enough, depending on what you want to achieve.
A 'bro split' like chest and tri's, back and bi's, legs and shoulders is another option. As are chest/back, legs/shoulders and rotate thru so you do each routine twice every second week.
Full body routines are also good. I'd probably tend to err towards these as I like hitting body parts more than once a week but that's personal preference.
Just throwing options out there really