jefequeso: Personally, the "emotional moments" are the parts of HR I despise the most. Cage's penchant for hammy emotional manipulation often borders on pornographic. And to make things worse, he loves to throw such scenes in just for the hell of it, using them as cheap shots rather than as anything with narrative importance.
The question is which scenes you're referring to. "Hammy emotional manipulation that often borders on pornographic" and "just for the hell of it" - yeah, I absolutely agree with these descriptions for certain scenes in the game but for me this mostly applies to the implausible over-the-top moments like the torture maze, the self-mutilation, the shootout with the mobsters and everything related to the FBI agent's drug addiction. But I must admit that IMO moments like the intro where you play with the kids in the back yard, the playground scene, the evening the second kid disappears (whose name I forgot) were some of my favourite parts in the game. For one moments like these are uncommon in games and thus fresh input that I welcome, secondly I think they do contribute to both the plot and experience despite being seemingly unnecessary for the plot. They do help you identify with the protagonist and they do add an insane lot of suspense.
jefequeso: I just don't think Cage is a good writer or storyteller. And his games rely completely on writing and storytelling.
I think that's a bold statement. Well, for one I think that he's a decent storyteller but terrible writer. I think his ability to deliver a crappy story in a manner that a huge portion of players will enjoy is kinda proof of it (and that despite the shoddy acting). And I also very much disagree with your statement that his games completely rely on writing and storytelling at least as much as I would disagree if someone said such a thing about movies in general. Also movies largely rely on aesthetics, atmosphere etc. and are sometimes so good in this respect that they are worth watching despite badly written implausible plots. And I think Heavy Rain does deliver when it comes to this. Additionally Heavy Rain experiments a lot with the format and is (or at least was) technoligically quite impressive, things that maybe won't turn this badly written mess with sucky acting into a masterpiece but do hugely contribute to Heavy Rain being an interesting gaming experience that is worth your time.
And the thing is, Heavy Rain is a game that needs just a few out of context moments to mesmerize you (well, maybe not literally
you but many people out there). IIRC the demo consisted of three unconnected moments (the PI's first scene, the first crime scene investigation and the home invasion), there wasn't even really any plot going on there and the game managed to shine. I think the stuff that made the demo an impressive experience that made many people long for more perfectly captures everything that also made the full game worth playing.