Normally I can only watch 4 episodes a day, if it's at night, right now I want to watch 4 episode in the morning and 4 at night but I don't know if I can, I think the longest dramathon I had was 7-8 episodes, and probably the time I watched nobuta wo produce in one day.
The only dramas I've watched 7-8 episodes in a day have been: Secret Garden (spent almost a night watching 7 episodes) then President, which I spent watching almost 8 episodes I think but with breaks, Innocent Man and Secret, I think for Iris I watched 6 episodes in a row but yeah..can't watch more... plus I take little breaks if I watch more than 3 eps in a day