Google the phrase "(Your first name) looks like" and find the best one from the first page of results. Don't forget to put it in quotes marks when you search, otherwise it won't work.
"Amanda looks like any nerd in school, but she is actually really smart and cool. She is smart because she knows everything about bugs" (I like this one cause I am such a geek!) and "Amanda looks like a tall, masculine version of Kitty the Dance" (cause it's random!)