Hamlet is pretty good. Let's be honest.

Hamlet is genius. The play covers so many different areas of life that so many people can relate to today and have been relating to over the centuries, provoking so many human emotions that will continue to exist for an infinite amount of centuries to go by. Love, tragedy, lust and the inevitable acknowledgement of death. The human race at some point will experience these emotions and quarrells, or at least it's highly likely.
However this isn't the whole reason the play is so highly remembered and reworked. The quote 'to be or not to be' is to be noted. Everyone has either said, heard, told, or misleadingly told it. 'Hamlet is without question the most famous play in the English language. Probably written in 1601 or 1602, the tragedy is a milestone in Shakespeare’s dramatic development; the playwright achieved artistic maturity in this work through his brilliant depiction of the hero’s struggle with two opposing forces: moral integrity and the need to avenge his father’s murder.'http://www.enotes.com/hamlet - This sums up the impact of Hamlet very briefly.

Maybe Hamlet is so popular without even knowing it. People quote it and can talk about it without even seeing it and maybe just know of it. There seems to be a collective knowledge of the gist of the play, which is why, in my opinion, the play has a huge popularity. It has become a huge reference in dialogue and education and my thoughts are, it will continue this way.