I pay cash for just about everything. If I pay cash I know I made the purchase. There is too big a chance of fraud with credit/debit cards. Since I have the memory of a goldfish, I don’t want to have to go through my statements every month and try to remember if I spent $17 at some random 7-11 4 weeks ago, or whether someone else did.

I don't see how anyone would want to pay the check in a restaurant using a credit card. As soon as I'm handed the check, I put the cash on the table and leave. Otherwise you have to wait for the waitress to come back 5 minutes later (10 if it's a busy night) to take your credit card. Then another 5 or 10 minutes later, they come back with your card and receipt for you to sign. Waiting that extra 10 or 20 minutes twiddling your thumbs when you just want to get the hell outta there is excruciating. And with your card, they can easily bump up your tip and you probably would not even remember the exact amount you wrote down to compare with your monthly statement.