I like the rhyming scheme. You touch on a topic that speaks to people. I would suggest making it longer, though. It feels a little blotchy, like there should be more describing what's going on. I'd also recommend putting either a semicolon or a period after maddest and a question mark after saddest (because the "who" is making the sentence a question). I did like your choice of words as well; they flow quite nicely. Overall, a good poem.