The thing I hate about almost all plugs and sockets is that you almost always have to check the orientation before you can plug something in. Sometimes you can

The thing I hate about almost all plugs and sockets is that you almost always have to check the orientation before you can plug something in. Sometimes you can do it by feel, but generally you have to look. USB-A is the worst because half the time you get it wrong despite looking. Cylindrical plugs (phono, barrel/coxial, BNC, Edison screw, banana, etc.) are great because orientation doesn't matter. Also, the 'click' you get from phono or BNC connectors is satisfying. RCA connectors mess up despite being cylindrical because they generally come in twos or threes, so you still have to check which goes where, which defeats the purpose of a round plug.