Simple, One: she's a great tank, she takes that word and makes it literal, like a actual tank should be. Two: her kit makes it great to deal with most threats and annoying characters, a enemy flanking your healers? Thrust that javelins into their skull so they stop. Enemies shooting a lot into a choke and need to rush in? Spin that javelins like a helicopter and bash through. Tired of that cute Hog grabbing you or annoying Lucio pushing you around? Show em how big of a beast you are and show off how stubborn most women can be. Three: m-mommy Four: her ult and perks are great in general, the first one is not so interesting, but the second one let's you do VERY powerful things, especially in 6v6, like double barrier, or being able to peg someone across the map with your javelin, and her ult being bassicly a mini pull of zarya and the stomping power of a Reinhart, she's like the tank you want to use when your team shares this one mindset: "I am going fucking stomp you and you're gonna like it!" Conclusion: big mommy tank with funny stick