Cash is faster, I have better control over my money (but that's just because of how I'm handling them, YMMV), and the privacy part doesn't hurt - That's more of a principle than anything else, I really feel that we must have a anonymous way for payments AND that the anonymous method must not in any way be suspected of foul play just for using it. That is the first "danger" that will come, that people get so accustomed to cards that the day someone wants to pay a packet of gum with cash you get suspicious - that is something that I will truly dislike. And given the current development I see no reason as to why that won't be the case in the semi-near future.

Also, cash is much safer. That everything that is needed to take money for me is written on a card that I have to pick out for every purchase is beyond lunacy. And people actually have stomach to say that post-it notes with your password is bad (it is, but in perspective)...

So part of why I mostly use cash is of principle, cards are just so insecure. It's not that I'm afraid I'll get in trouble but part is principle and the other part is that I have no idea if my "secret" number is revealed to the wrong person. 8 months later I'll potentially be denied a purchase because the card is empty...

I do however use my card from time to time, but mostly cash. And so far the benefits of using cash are actually greater than that of a card in my eyes - so even without the benefit of security and privacy I'd still use cash.