[laydn]

It just had to be non-symmetrical on the Z-axis, that's all. Like an HDMI connector.

[simonjgreen]

Or displayport. Personally I find hdmi almost as annoying as usb, though I can’t explain why that happens!

[opan]

One problem with HDMI is that it has no clips or screws or similar holding it in, unlike DP, DVI, VGA, BNC... I remember I used to knock the HDMI out of one of my monitors with my foot all the time. It plugged in going straight up and barely could resist a bit more force than gravity, and the cable dangled behind the desk since the tower was on the floor.

[jve]

Because when you have to plug hdmi on a wall mounted tv or monitor that is close to wall and hard to rotate - you end up not only guessing orientation but having a hard time to find that port... :)

[perilunar]

or perfectly symmetrical, i.e. round.