Critic
A critic is a person who reviews things like movies, books, and food to see if they are any good and if other people would like them. They write reviews about what they have seen or read.
Critics may write about art, music, theatre, politics, movies, television, books, or anything in which good or bad is a matter of personal opinion.
Roger Ebert, Gene Siskel, Raymond Williams, Susan George, John Ruskin, Rene Ricard, John Amis, Vladimir Vladimirovich Kara-Murza, George Bernard Shaw, Robert Schumann and Pauline Kael are some famous critics of art, music, politics and movies. Most of them are professional.