What qualities do you look for in a friend?
Another way to phrase this question: which quality or character trait do you value or respect most?
Alternatively, which quality or character trait do you hate most or respect least?
If you need it, here's a list of character traits.
If you like, you can make an ordered list, as in quality 1 is most important, quality 2 is second-most, and so on and so forth.
Please don't read the comments until you've thought of your own answer to this question.