Would the following phrase be considered positive or negative?

a fairly revealing study

positive

Would the following phrase be considered positive or negative?

they can and will turn on a dime from oddly humorous to tediously sentimental .

positive

Would the following phrase be considered positive or negative?

except maybe for the last 15 minutes , which are as maudlin as any after-school special you can imagine

negative

Would the following phrase be considered positive or negative?

romance , dancing , singing , and unforgettable characters
positive