Silent Hill.
The first one was fantastic, the second one was brilliant, the third one was... interesting and the fourth one was different, but actually not as bad as other people have been saying it is.
Then the others happened. Silent Hill: Shattered Memories, Silent Hill: Origins and Silent Hill: Homecoming. As far as I've seen, if it doesn't have a number after it then it's not going to be anywhere near as good as the "original" series.
That being said, I'm still waiting with baited breath for Downpour and hoping for a miracle to happen that makes it one of the best in the "new" series. I know that it hasn't been treated very well after it was given up by the original team, but I'll still come back to it in hopes that I can recapture that feeling I got when I played the "original" series late at night with the lights off, hoping to make it to the end.
I love the mythology, even though they've abused Pyramid Head recently (seriously, he was supposed to have been dropped after SH:2, it was a one-time deal, give it a rest), I'm still fascinated by how everything fits together and all the various interpretations and conclusions you can draw from the events that happen in them. Even the most innocuous of quotes have been scrutinized beyond recognition and I've seen people write pages on the whole "they look like monsters to you?" quote alone. So, even though the voice acting is lame, it's very hard to deny that the whole thing is pretty neatly written.
Also, Devil May Cry. I honestly don't care about the story any more, as long as the combat system isn't ballsed up I'm happy. As far as I've seen, its got the most versatile and amazing combat system I've ever seen in a game that has never been surpassed. Look up any one of the combo videos to see just how well crafted the combat system is.