@Jane Marie are pickparkers a thing?
@Jane Marie sorry, more like pick-garagers or something? Pardon my broken English! Just be careful when parking your bike/scooter because it could easily be stolen (esp. Overnight!).
@Barcelona also, tropeziennes (cool French brand); and if you're here go to Andreas, basically the best knock-off shoe store in town.
I'm from Barcelona, and during the daytime between April - May and September I only ever wear havaianas (also sometimes randomly on sunny winter days). The touristy spots are quite filthy, but a) I wash my feet all the time, b) havaianas are like 20€ a pair, and c) the dull colours go with ANY nail polish! As for pickpockets, watch out. I'm sorry to say this but it's pretty terrible, especially re rental bikes and/or scooters. But, VISCA BARCELONA!