I used my Visa to effectively launder all my housing expenses, car expenses, food and pretty much everything else. Pay it off at the end of the month, and you can just about rack up a free flight to Europe every year (thanks to the morons who carry a huge balance and pay the minimum every month). I think of it as my tax-payers revenge against the morons whose existence I have to subsidize. Makes me feel a little better (vengeance is a pretty underrated narcotic IMO; no diminishing returns as far as I can tell).
Which card? Specific airline?
Visa card through my bank. No specific airlines.
I see that they did just make some "post-economic meltdown" adjustments. Haven't checked how that affects me (it gets complicated some times, because some airlines are occasionally iffy about flying into some Middle Eastern airports). Planning a trip to Lebanon, and am anticipating flying into Jordan and buying a separate transfer.
Personally, I go in cycles but find it much easier to use credit card/debit card so that I can easily track where I'm spending my money without a Costanza wallet.
This.
I can download the itemized info from my bank and credit accounts directly to Quicken, and can easily and more efficiently track all my household expenses when it's plastic (or a check). I'm very Medici about disdaining the handling of "dirty money." (And don't get me started on change. Srsly. Why don't we just barter some chickens or something?)
I pretty much just use cash to get better deals (and to buy hookers/coke). Can't wait until the "mark of the beast" comes out. Sounds super convenient.
Of course, I still have a Costanza wallet, but now it's full of Subway coupons, random gift cards from the holidays and my "F.emale B.ody I.nspector" badge.