Repetitiveness at its finest.
It could be the random dungeons the game makes. It could be the really cheesy storyline. Or it could be that it was a old game. When I was playing this game, an unopened Okami was sitting in my shelf. Waiting to be opened and just teasing me. That could be another reason, I just wanted to move on, play another game.
I was really close to beating the game too. I was at the 2nd to last chapter but as soon as it asked me to go after 4 gems located in 4 different Areas within dungeons I had enough. I always finish story based games to the end, for all games I've played, no matter how bad or repetitive it was. This will be my first game in my collection to do that. Although I may go back but the chances of me going back to a game to not have fun is slim.