Would the following phrase be considered positive or negative?

a film that 's rarely as entertaining as it could have been

negative

Would the following phrase be considered positive or negative?

this makes minority report necessary viewing for sci-fi fans , as the film has some of the best special effects ever .

positive

Would the following phrase be considered positive or negative?

be surefire casting

positive

Would the following phrase be considered positive or negative?

while peppering the pages with memorable zingers
positive