For me it's One piece. After watching it for a very long time, I dropped it but I am sure I will pick it up again. I did drop Attack on Titan long back, as it's hard to wait for the new episodes every week.
When I force myself to watch anime just because of a competition, I used to think about my life and why I had to do it but these days, I haven't felt that way and I don't force myself to watch anime now.
