There are two reasons to love this play. 
 The first reason is Lady Macbeth. Man, that girl has got it goin' on. Have you ever found yourself in the running for, say, a new position that's opened up at your company, a position for which you--along with one of your equally worthy colleagues, perhaps--might qualify? You may not have given much thought to your professional advancement before, but now that this promotion has been dangled before you, it has ignited a spark of ambitious desire. Imagine the possibilities! And it is just within your grasp...if only there were a way to edge out the competition. Maybe you could sabotage a project he's working on. Or you could discredit him by rumoring of his incompetence. Better yet, you could off him in the parking garage. But each of these strategies requires a certain level of gumption to execute, a level not everyone possesses. This is where it pays to be married to Lady Macbeth. All she would need is a mere mention of this potential uptick in your career path and she's off and running, drafting the schematics, telling you where to stand (just outside the stairwell, across from his car, within easy reach of the tire iron lying in the corner that can be used while he's distractedly sifting through his keys). Why doesn't she do it herself, you ask? Well, why should she? It's not her job. Her job is to support you, to boost your confidence, to supply that additional gumption. You're the one who has to do the dirty work. 
 Lady Macbeth is an amazing character. I've seen reviews on here that criticize her for being the morally reprehensible of the two protagonists, planting ideas in her husband's head that he would not have otherwise formed, encouraging him toward evil deeds that he would not have otherwise committed. I disagree. She may have made a mistake helping to plan Duncan's murder, but if anything Lady Macbeth is the one with her moral faculties still intact--she exhibits a profound sense of remorse at the end of the play that Macbeth recognizes as nothing short of an ailment for which to seek a cure. While Macbeth is off slaughtering anyone who might threaten his regal standing, his wife is at home rubbing the fuck out of her hands until the blisters explode and she suffocates in a pool of her own pus. 
 The second reason to love this play is the eloquence of the language. There are passages in this play that describe human emotion so briefly yet so profoundly it triggers goosebumps. These are some of my favorites: 
 On expressing one's grief: 
 What, man! ne'er pull your hat upon your brows; 
 Give sorrow words: the grief that does not speak 
 Whispers the o'er-fraught heart and bids it break. 
 On not having enough gumption: 
 Yet do I fear thy nature; 
 It is too full o' the milk of human kindness 
 To catch the nearest way: thou wouldst be great; 
 Art not without ambition, but without 
 The illness should attend it. 
 On contemplating ambition's worth: 
 Nought's had, all's spent, 
 Where our desire is got without content: 
 'Tis safer to be that which we destroy 
 Than by destruction dwell in doubtful joy. 
 On being past the point of no return: 
 All causes shall give way: I am in blood 
 Stepp'd in so far that, should I wade no more, 
 Returning were as tedious as go o'er. 
 On the futility of life: 
 Life's but a walking shadow, a poor player 
 That struts and frets his hour upon the stage 
 And then is heard no more: it is a tale 
 Told by an idiot, full of sound and fury, 
 Signifying nothing. 
 On the finality of death: 
 There's nothing serious in mortality: 
 All is but toys: renown and grace is dead; 
 The wine of life is drawn, and the mere lees 
 Is left this vault to brag of. 
 I said in the comments section of my 
 Hamlet 
 review that I was preferring Hamlet to Macbeth. While I think I prefer the character of Hamlet to that of Macbeth, I no longer stand by that statement in terms of the play itself. Macbeth really is a masterpiece.