most favorite j-drama of all time :)

I don't know about the 'best' but as far as personal favorites go, my top 3 are:

Kamen Rider W (closely followed by OOO and Fourze) 

Team Batista (all seasons) 

Yowakutemo Katemasu (mostly just because I could relate to the Jotoku coach to a scary degree. The show as a whole was okay-ish)