FFXIII and Dead Island fit this mold for me.
Not that I didn't enjoy these games, in some form, in some time, but after finishing them...Just a bad taste afterwards.
Now, I hardly ever follow a game's development religiously. I find trailers enough of a turn-off, usually (dead island's, on the other hand, REALLY drew me in, to a contrary experience). If I ever feel like I'm following a game too closely, I'll do one of two things:
1. Go out somewhere
2. Play another game
I'm older now, so I don't have fathomless capacity for excitement. I have to spend it wisely (-.-), so when the inner fanboy rises for a particular game, nothing soothes his temper better than either playing another game, or not playing a game at all.
I also find too much excitement leads inevitably to expectations, no matter how hard you resist. I kept looking for a good story in Dead Island, even though I realized that wasn't where its focus was (though, it gets demerits for trying to horn that in and failing). FFXIII might have seemed a bit less bad, if I was less of a fanboy of the series.