Respectful of my time. Think of dating - if after 3 dates, you still are not sure if you like somebody, maybe it is better to call it quits. I had companies call me in for more than 4 interviews, distributed over several days. Not respectful.

Coding: I actually like coding tests in interviews. Then I know my potential future colleagues will also have had a coding test. The company cares at least a little that my colleagues can code.

Just don't take the coding test too seriously. Don't expect me to write correct syntax on a whiteboard, for example. It should be more about having the right ideas, or even be able to discuss possible approaches if a solution isn't obvious immediately.

Also, make it a little challenging - no computing of Fibonacci numbers or FizzBuzz.

I liked one where I was asked to implement Quicksort (not that original, but OK), but they also gave me a definition of Quicksort along with it. That seemed fair.