This is a really intriguing topic to me.
I think one of Shakespeare's works is the most obvious choice.
I am leaning toward 'Twelfth Night' because of its many facets- comedy, love, drama, poetry, illusion, etc. It's probably the greatest comedy of all time... but then again, pretty much all of Shakespeare's plays are brilliant.
I'm also leaning toward 'Romeo and Juliet.' Something about reading that work- not necessarily seeing it as it can be a huge bore when directed with no wit- makes my heart just turn with the pages. It's beautifully written. And Juliet's "banished" speech is probably the most heart wrenching speeches every written for a female in the theatre.
'Julius Caesar' still shocks me with its wonderfully modern relevance. Its timeless in that the politics have stayed the same all these years. It's exciting; it's tragic.
Wow. I don't know what to choose.
I'm going to have to say 'Romeo and Juliet.'
I feel that of the three stated above it contains the most- love, tragedy, comedy, one of Shakespeare's most colorful characters (the Nurse), and a heart-stopping conclusion... and if your name is Baz- room for a dance break.