One of Shakespeare's funniest comedies, in my opinion. While I think there are other plays with more meat to them, this play, when staged correctly, can absolutely bring the house down! #TheReveal #YellowGartersWho
Additionally, it is frequently under-appreciated for the number of famous quotes from that come from its lines. Enjoy:

If music be the food of love, play on.
(Orsino, Act 1 Scene 1)

What country, friends, is this? 
(Viola, Act 1 Scene 2)

Better a witty fool than a foolish wit.
(Feste, Act 1 Scene 5)

O time, thou must untangle this, not I. 
It is too hard a knot for me t'untie.
(Viola, Act 2 Scene 2)

I was adored once too.
(Sir Andrew, Act 2 Scene 3)

She pined in thought, 
And with a green and yellow melancholy 
She sat like patience on a monument, 
Smiling at grief. 
(Viola, Act 2 Scene 4)

Some are born great, some achieve greatness and some have greatness thrust upon 'em.
(Malvolio, Act 2 Scene 5)

Foolery, sir, does walk about the orb like the sun, it shines everywhere. 
(Feste, Act 3 Scene 1)

Also:
Sir Toby has Dwight Schrute energy—change my mind.