Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: I think 'Sleep' is my favorite from How did we get so dark?, maybe because I'm insomniac
This tweet contains emotions: 
joy, love, optimism, sadness