Good for you guys! I'm glad you've got credit card "religion."
Paying in full may increase your credit line. I'm not sure.
But I've been told that credit card companies have a term they use to describe those who pay off their balances every month and don't pay any interest. The term is "deadbeat."
Interesting, isn't it? Publicly, they would have to agree that we are wonderful customers. Privately, they hate us because they're losing money on our accounts. But don't cry too many tears. . .they're making it up in spades on the unfortunates who haven't figured out how to play the game--or don't have the discipline to do it.