Back in a former life as a credit approver, I liked to see payment history. If you're building credit, pay it down to a couple hundred dollars and keep it there, paying more than the minimum payment every month, but maintain a balance and payment history for as long as possible. If your credit is otherwise good (and varied), and you're stable in employment and residence, you can pay it off if you want. If your debt-to-income ratio is high (your monthly payments as a percentage of your income), it will benefit you to pay it down or completely off.
Back in the old days, the credit bureaus just showed a limit, current balance/payment due, highest balance used, and payment history showing only whether or not payments were on time or late. I haven't seen a bureau in about 12 years though, so I'm not sure what they contain these days.