I buy everything with credit cards.  any problems I don't have to pay.  cash is gone, same for checks.  in places where I don't trust to use my debit like gas /restaurants then it's cc only.
what you guys don't understand is that for any fraud/w wrong charges on cc all it takes is one call and they get reversed.  cash our check good luck getting your money back.
semp
 i do understand that. i've never had a problem with paying by cash or check. in stores, i see lines held up though, due to people having to punch in pin numbers, or having a card declined.......in the time it takes them to handle one of those, 3 or 4 cash customers can go through. 
 they also charge the merchant a percentage, and a service fee for being allowed to accept your card, along with the interest you pay for carrying the balance. 
 for some people, cards are ok.........but all in all, i think they suck.