I have my own opinions, obviously, but I did some research to see how they compare. What I found was best summarized by this information from www.serviceuntitled.com:
Attitude: Look for people who genuinely mean it when they say “It’s my pleasure”
Aptitude: Knowledge is key; a great attitude alone can’t fix the problem. Give your support people the tools they need to educate the customer.
Drive: You may find the constant questions irritating, but a good Support Person is driven to solve the problem and help the customer.
These three were listed most often. Another quality that I greatly value is flexibility.
How do these qualities measure up to what you look for in a Customer Support Representative? Let us know if you have other characteristics you feel are important.