I have different cars, too, one with front and one with rear side. My personal preference: side ports, and towards the rear if possible (e.g., like Tesla has it).
But I can back up that preference: Side ports make it easier to see who needs to be plugged in.
Here at work we have over 75 plug-ins and dozens of EVSEs (viewtopic.php?f=26&t=24456
). Since each EVSE is shared by 2 parking spaces, if you were the second car to arrive, you need to go out around lunch to plug in your car. Our approach here is to open your charge port when you park, so that you can get plugged in by anyone who sees the first car is done charging. As I (or others) walk in the garage down the row of 30 parking spaces (with 15 EVSEs), it's nice to swap other cars where the first car is done.
With most of the cars out there, it's really easy to see who is waiting for a charge, since the charge port is on the side and you can tell if the port is still open (since you close the one for a finished car -- unless it's a Tesla with the J1772 adapter plugged in). The only annoying cars we have on campus are the LEAF and Soul EV, since both have front-center charging ports. You have to walk in front of the car to see if the port is still open.
This is just a tiny, "first world" annoyance, but it's something that happens every single day at (my) work.