Have an opinion about something or someone? Use the term pensare a or pensare di, which both mean "to think about." Take a look at a few examples in Italian:
In questi giorni penso a mia nonna perché è malata. (Nowadays I think about my grandmother because she is ill.)
Che cosa pensi di quella macchina sportiva? (What do you think about the sportscar?; What is your opinion about that sportscar?)
Spesso pensiamo ai nostri cugini che vivono in Italia. (We often think about our cousins who live in Italy.)
Giovanna, dimmi la verità! Cosa pensi dell’esame? (Giovanna, tell me the truth! What do you think about the exam?; What is your opinion?)