Shakespeare is indeed amazing! If your teacher will allow you to use personal voice (your own individual response), explain exactly what amazes you about his writing. Is it his use of language? If so, what about it? Is it the characters? If so, which characters stand out most to you and why?
In addition to thinking to what themes in his writing are still relevant today, you might consider how he wrote about themes--such as the rights and obligations of kings--that may not be directly relevant but still can be applied to issues today. What is it about his writing that allows us to make those connections from his time to ours?
My advice would be to focus on the works you've read, so you can use specific evidence to support your ideas.