In reply to FreshSlate:
> Six whole days and you didn't personally see any crime! Barcelona is known as the pickpocket capital for good reason.
I've been there loads of times and never seen any crime, although I have heard plenty of second hand stories... Mind you, I don't flash stealable stuff around, keep my bag at the front of me, zipped up with my hands on it, and don't do things like put cameras or phones on tables, and tend to go to the less touristy areas.... I do the same in any major city.
Second the point about not bothering with a hire car - not worth it unless you are actually leaving the city. It's easy to get the train from the airport into the centre and then use buses, walk, taxis, underground - all very straight forward and cheap.
The ramblas - touristy, tacky, street artists, tat for sale. I wouldn't bother if I had limited time, but it is one of those things that is worth doing once, so that you can gasp in amazement at how tacky it is before heading elsewhere to eat and drink....