I’ve been playing with GameTable and TokenTool recently, and one thing I’m doing is to create pogs based on photographs of my players. It’s immediately clear who they are, for one thing; and for another, they are transferrable between campaigns.
Here’s one of me as an example. I’ve used square tokens rather than round, since I plan to print them on giant sticky labels, stick the labels to foamcore boards, and trim them to shape – that’s a lot faster with square tokens than round ones.