Here's my last gasp of Europhilia: The Euro has much better denominations than the dollar. Instead of $1 bills, they've got 1€ and 2€ coins, worth about $1.50 and $3.00 respectively. Tipping's a lot easier; so are vending machines. The bills start off at 5€, which means you'll probably never have trouble closing your wallet.
Europe's a lot more expensive than the last time I was there, but spending money is noticeably more convenient.
P.S. Per my last post, having one good thing to say about the Euro doesn't mean that I favor it overall, that there aren't better options, etc.