[AChimp]

Paper money is stupid because you can't use it reliably in vending machines. It's such a pain in the ass to try to feed a bill to one of those scanner things, only to have it spit it back out because the bill is all mangled and shit.

And all US money is the same colour so I have to actually look at the numbers when paying for something. Multi-coloured bills help handi-capped people!