We want to have a 7-day-access 'cause the price is much better (including 50% off for Costa Caribe). I've been to Port Aventura 6 times before but we want to be as flexible as we can... we're spending 10 days in Salou and love to have the opportunity to hop into the park a whole week whenever we want to.
An annual pass costs 129€, a 7 Day Ticket 73€ ... 56€ is really a significant difference, especially for young students