Which characteristic adds to the appeal of hamlet the character? his desire for revenge his eloquence being a prince being a hero

His eloquence.

Explanation:

Of all of Shakespeare´s memorable characters, it is perhaps Hamlet the one that stands out the most in regards to the way he employs language and thought to convey ideas on mortality, life, love, duty, amongst many other profound and difficult topics that Shakespeare so elegantly elaborates. One can bring to mind, to mention but a single example, Hamlet´s famous soliloquy which begins thus: “to be or not to be” —without a doubt some of the most incisive and beautiful lines ever written in the English language.  

edmund spenser and john bunyan is the answer. hope i !