lol i did visit the football stadium as part of the tour we went on, it wasnt that big. We were a bit bored so we messed about in the museum haha.
i actually stayed in salou in spain and just visited barcelona for the day, our tour guide told us about how most people there want to be part of catalunya (sp?) instead of spain or something.
i dont think i went to the gothic neighbourhood, we didnt have a lot of time. i went to the football stadium, olympic stadium, a hill so we could see the whole city, la ramblas and then the sagrada familia.