Catalan culture is quite diverse given the fact that Catalonians are from one of the richest areas in terms historical traditions although most of them are much more informal today. However, the culture is generally very celebratory and upbeat and while travelling through Catalonia you will find that most people are genial and friendly.
One of the most interesting marks of popular culture in Catalonia today dates back to the 18th century and is the actual practice of building human towers. Teams across the country compete in this challenge in a literal attempt to build the largest human tower, which can be surprisingly quite thrilling to watch.
Also worth observing if you get the chance is the traditional and popular sardana Catalan dance form. During the summer time around festivals you may get the chance to see groups of people dancing outdoors singing songs followed by the consumption of burned rum. Fireworks and parades are also quite popular during celebrations and you will notice that it seems the people of Catalonia always seem to have something worth celebrating.
Bullfighting also used to a popular pastime in Catalonia but soon this activity will be banned and is now looked down on, so avoid asking the locals about catching a bull fight while visiting. Do make sure to try out some of the local flavour of the cuisine however as it is spiced and memorable to say the very least.