The thing I dislike the most about Barcelona, and Catalunya in general, is the number of people who smoke. It is not just that people smoke openly but that they do so indoors as well - even in elevators. Every pack of cigarettes has a massive notice on it that says that smoking will kill you and yet people seem to not just care and smoke anyways. It is literally impossible to avoid second hand smoke in this city. It is simply disgusting.
About Frank Rietta
Frank Rietta is a web application security architect, author, and speaker. He is a computer scientist with a Masters in Information Security from the College of Computing at the Georgia Institute of Technology. He speaks about security topics and was a contributor to the security chapter of the 7th edition of the "Fundamentals of Database Systems" textbook published by Addison-Wesley.