I'm happy that you like Croatia! Porec (and Istria) are wonderful places to visit. If you get the chance I'd also recommend the island of Cres. There is a famous beach called Lubenice, under a steep hill and an old town, and also on the south side of the island you can find real beach-gems (i.e. Meli beach under Punta Kriza village). Hope your batteries are full after this summer, best of luck!