Prompt for the day: The "I Want" Song

It's not really that there is a "formula" for these things, but I have learned over the years that pretty much any successful musical you can name has an "I Want" song for its main character within the first fifteen or so minutes of the show. 

--Stephen Schwartz

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If your main character sang an "I Want" song, what would it sound like? Set the timer for 15 minutes and write one in any form: dialogue, a daydream, a stream-of-consciousness passage. . .