I went through the rather painful experience of cancelling a credit card this morning. I've only had 2 cards over the past 20 years or so, and decided since I don't carry any balances, I didn't need 2, so I cancelled one.
It took over 30 minutes on the phone to cancel the card. I was transferred to 7 different people, 3 security specialists, and had to answer question after question to do this. They make it very easy to get credit cards, cancelling them however, seems like an endless process.
Anyway, here's a good rant on credit cards for any of you Dave Ramsey fans. There's some very interesting facts about credit cards in this short video, and it's worth a watch, imo.