Games you put down after a significant time investment. Have you ever successfuly returned?

[Farsala]

Despite being a FF fan, I rarely choose to beat the game. For example:

FFXII: I got to the last boss, when I realized this was the end I was in too much denial and didn't beat it.
FFXIII: I got to the last boss, the game was so bad that I decided it was not worth any more of my time to beat it. I gave it a fair run, but in the end it was not worth it.