Will try to keep everything spoiler free since I will be talking about my recent experience with a game...
So I recently finished Enslaved: and I have to say that it had a wonderful story, excelent voice acting, great character development and development of character relationships without getting sappy, and some of the best facial animations I have seen in any game... but the gameplay is a resounding meh (not bad by any means, just meh)... but I found myself wanting to keep playing to see how the story and how the characters develope. Not GOTY material, but considering that most games now-a-days don't even know what a story is or how to develope a charater, I was pleasantly surprised by Enslaved.
So, to discuss, have you had this experience? Where a great story/character has made you want to finish a game dispite it's gameplay flaws. What was the game, and what about it made you forget it's shortcomings.