I remember when the $50 / $20 / $10 / $5 changed while working at a bank. You always had scattered people bitching, because they didn't like change. "Monopoly money." All I have to say to that is, who cares? It's paper that you use to buy things, not hang up on your wall to display the world's most boring currency.
I always thought the Swiss franc was cool. The newest Canadian redesign looks cool too.
Melon