As film critics go, Geoffrey O’Brien is a lover, not a fighter: unconcerned with starting quarrels or settling scores, he simply aims to share his pleasure in what he has seen. Perhaps his remarkably good temper stems from the fact that he is not a full-time critic, but an example of that nearly extinct species, the all-round man of letters. He is editor-in-chief of the Library Of America series, and oversaw the latest edition of Bartlett’s Familiar Quotations; he has published six collections of poetry, along with books on pop music, hard-boiled fiction, and the history of Times Square.