mocci:
I may re-watch selected episodes multiple times if they are available online (or I own the DVD), but I seldom re-watch whole dramas because it takes a lot of time. Take Nirvana in Fire - I loved this series and I'd love to watch it again someday, but when I think of the number of episodes...
The only exception is when I like a show enough to buy the DVD/BD after the drama has finished airing. Those things are hellishly expensive so if I make the decision to add a series to my shelf, I will watch the whole thing at least one more time, if only out of sheer stubbornness. Examples: Team Batista 1~4, YowaKate, Hanzawa Naoki, Tamiou, Shitamachi Rocket, Ryusei no Kizuna.
It's easier with movies. I'm pretty sure I've watched Shin-Godzilla over 10 times already.
Gosh. it's true about NIF. Because of my studying, I could only rewatch ep 53-54 countless times.