Rooftop Prince,Oh my Venus and Emergency Couple. :))
Rooftop Prince
Oh my Venus
Emergency Couple
Fated to love you
Splash,Splash Love
Noble,My Love :))
You Who Came from the Stars
A Gentleman's Dignity
She was Pretty
Delightful Girl, Choon Hyang
Marriage Not Dating
protect the boss
She Was Pretty
Reply 1997
High School King of Savvy
I second everyone who said History of Salaryman (at least its first half) and Modern Farmer. Another Kdrama that I found particularly funny is Merry Mary, too bad so few people have watched it.
the funniest kdrama i ever watched was a gentleman's dignity
You Who Came From The Stars
Masters Sun

I haven't finished both but they're really fun to watch ;__;
Hana Kimi. The first one.
I think that would be You who came from the stars for me. The Master's Sun, The Producers & Splash Splash Love were pretty fun as well. Rooftop Prince's first episodes were hilarious as well, after that the series became a little more serious.

@Ettie: For J-dramas, I'd agree with you, Hana Kimi wins hands down \o/
Reply 1997, especially when the goat sound came
Descendants of the Sun, comic timings were spot on.
She was Pretty, I really enjoyed the humor xD
Rooftop Prince, Oh My Venus, She Was Pretty, Kill Me Heal Me, Master's Sun and Fated To Love You :D
Rooftop Prince, Oh My Venus, She Was Pretty, Kill Me Heal Me, Master's Sun and Fated To Love You :
Rooftop Prince, Oh My Venus, She Was Pretty, Kill Me Heal Me, Master's Sun and Fated To Love You :