What I want from NFC phone payments
I'd like the amount to pop up on the screen, together with green and red approve/reject buttons. The most aggravating thing about contactless is that you often don't see how much you're being charged; or that it is shown, but only on a tiny screen which isn't well-positioned or well-lit. You have to trust that the person operating the till correctly typed in £1.95 and not £19.95; or that they only charged you for your beer and not for somebody else's whole round.