Hi ODB. Just cross out anything you've already seen, and check out if any of the rest interest you.
For must-watch:
Kaseifu no Mita - probably had the biggest popularity in recent years.
LIFE - Maybe the most popular jdrama that overseas people know about.
One Litre no Namida - The classic that got everyone crying.
For some serious stuff:
Last Friends - All dark and emotional.
Bloody Monday - Anti-terrorist action with a bunch of teens. Main hook was figuring out who was selling everybody out.
Daisuki!! - Another emotional one to get everyone crying.
Pandora - Added this cos its one of my faves.
Three seasons about a cure for real-life health/social problems in japan, eventually causing danger to uncountable lives from its discovery. With tension building up more and more till nobody knows how to end it. Fun stuff.
And for the manga turned dramas:
Switch Girl - To turn your brain off and laugh.
Liar Game - Cos everybody has seen it.
Mendol - Girls who pretend to be an idol boy group, can't get more manga than that.
Saru Lock - Cos its funny.
Otomen - Cos its funny too.