I still have some to start, but here are my favorite dramas so far:
1)
Gekokujo juken: this drama deals with some serious issue about the Japanese educational system and I love dramas dealing with social aspects. It's a comedy, but the topic is serious.
2)
Byplayers: it's funny... no, wait, it's completely crazy! I love it, but I guess it may be hard to understand if you know nothing about the actors.
3)
Quartet: the first episode and the four main characters were intriguing. I really want to know more.
"A LIFE" is OK, but there's nothing original here. As for now, the taiga (Naotora) is also interesting... but I'm a taiga fan!