I use Amex blue cash preferred for groceries, Amazon card for amazon, Walmart card for walmart (still haven't gotten used to ordering groceries online, so only getting 2% for instore purchases after a year), and pnc cashback for 1.75% every day. I'm looking for a better catch all card with better cashback or benefits. I pay off my cards every week, just to make sure I don't carry any balance ever. I strictly use it as a cashback machine, and for security.