Good for you.I have zero credit card debt, but it took me a long time to stop using credit cards. When the kids were still at home, I used credit cards because it seemed as though the kids would need something, or grow out of their clothes pretty quick. There was always a "good" reason to use the card. I pay cash only now, and have been credit card free for about 16 years.
There is a down-side to this method, tho. Not saying it applies to you, but not using the credit card at all can impact your credit rating. If you have virtually no history of credit and payback, your rating can drop, and you may not get the best deals or rates on car loans or other big ticket items. Even insurance premiums can be affected. It's ok to use the credit cards, just don't overdo it, and pay it off every month.