Ahjussi Drama / Older male, younger female dramas?

It'd be nice if there were any more out there that have just passed me by or if you know of any more, but I honestly think I might have exhausted the list... 
I don't really care for the older female dramas - would like to put that out there, tried and tested and for some reason I always get bored. Even if there isn't any, I hope this serves as a somewhat useful list for those people who wanted more dramas. I haven't really explored the Taiwanese or Chinese drama side, though.

- PS: please read the list first!!! 

TV Shows I've seen:
- Kou Kou Kyoushi 1993 + 2003 (Jp)
- Hapi Mari (Jp)
- Hotaru no Hikari (Jp)
- Lie to me (Kr)
- Marriage Contract (Kr)
- Beethoven Virus (Kr)
- The King of Dramas (Kr)
- When a Man Loves (Kr)
- Successful Story of a Bright Girl (Kr) // (not sure if that counts tbf)
- Prime Minister and I (Kr)
- Goblin (Kr) // (THIS IS THE BEST)
- My Spring Days (aka Spring Day of My Life) (Kr)
- Mr. Baek (Kr)
- A Gentleman's Dignity (Kr)
- Bride of Ha Baek (Kr) // (also not sure if this counts??)

Films I've seen:
- Kinkyori Renai (aka: Close Range Love) (Jp)
- My Rainy Days (Jp)
- My Little Bride (Kr)
- 100 Days with Mr Arrogant (Kr)
- Hello Schoolgirl (Kr)
- Innocent Steps (Kr)

Otousan To Yabasate (J)
Family Honor (K)
Pasta (K)
I am Sam (K)
Little Mom Scandal (K)
Cuo Dian Yuan Yang (C)
Family's Form (J)

http://mydramalist.com/16775-love-song
http://mydramalist.com/16192-doctors

http://mydramalist.com/210-my-little-bride
http://mydramalist.com/241-innocent-steps

The Battle of Changsha (C)
The Painter of the Wind (K)
Valid Love (K - if it counts, because a big part of it is about a couple with the same age)
Surgeons (C - not a huge age gap though)
Iki mo dekinai natsu (J - between the lines romance)
Mitsu no aji (J)

Sweet 18
The Eccentric Daughter In Law
Jejoongwon

Trick- Kinda fits, he's obviously older but the drama isn't really romantic, the chemistry between the leads is great though.