Since this is SF, and we probably all buy a bunch of stuff online with our credit cards, I was wondering what the credit card landscape of our members looks like. AMEX, Visa, Mastercard, or other -- and why? I'm sure we all have our preferences over cash-back versus travel rewards cards, etc., but why? I'll start: CIBC Visa. But only because AMEX sucks in Canada. I don't particularly like this card, but the aeroplan miles work out well based on my annual spending levels. PS - this thread was inspired by redflagdeals.com (frugal Canadians will appreciate this).