Nothing wrong with Porto itself but I'm getting fed up with three plagues of all destinations
Effin walking tours. You get a crowd of 20 or more all listening to their leader through headphones oblivious to everyone else and all trying to stay together no matter how obstructive or pushing they get.

Temptation to push them into traffic is amazing but THIS time I resisted.
Miming street artists. No not mime artists but the cheats pretending to play an instrument while a loud music track plays through a music system far louder and far more annoying than proper played music would be -
Rip off ATMs.. No I am not going to pay £143.95 to get €140