Twitter users are watching people's icons, not their names. Why don't you raise your favorable public image by using your own cute or cool pop icon? Everybody is using it, YO!
Twitter users recognize others by icons rather than by usernames. So if you wanna impress others, how about creating a cute, lovable icon that shows who you are? C'mon, everyone's got one!
The Twitter users look at people's icons instead of the names. So, why not make yourself more favorable by choosing a cute and popular icon which can represent yourself? Everybody else is doing so.