Leigh you gave us some excellent examples here. You asked for a few others that aren't often thought of as bias.  Here are a couple I've witnessed.  1) Someone who comes in early to make coffee,  unload the cups from the dishwasher, and egads! cleans the microwave is not promotable. They are made for menial tasks.  2) Someone who is cheerful and friendly would be good for telephone work. 3) Someone who is super organized and handles their own responsibilities well should be in line for promotion to manager.  4) workers who come in early and leave late are ultra dedicated employees.

Thanks you for opening up these areas where we need to  watch for biases and not fall into them.