Is that a good decision?

Hey guys...
It's been a long time since my last post here, I've been checking the forum every single day, though.
Well, let's get to the point. I've been improving my English a lot by watching series, I like to repeat each episode at least 5 times until all the new words get fixed deep into my mind. It's a very deep method and it does work but it's kinda boring. I'm going to change my way to learn through series, I will watch each episode just once since I can understand 80% or so, with subs on. I can get the meaning of lots of words without looking up in a dictionary so this way I'll enjoy my favorites series while learning kinda 'unconsciously'.

What are your opinions on that, guys?