I have the PS3 80GB with that Motorcross game that came with it (I never play it, as I don't like that kind of game but my son does). I bought the system primarily as a Bluray player but bought a game to see how the system played (I love both my Xbox 360's and my wife loves her wii). I bought "The Darkness," which is also available on the 360. I loved this game and thought it played well on PS3. I invested a couple weeks of evenings to playing through this game, as it was as good as a book you couldn't put down (so they say). Then I made the mistake of doing EVERY side mission, including one that spawns a bug later in the game. There is what is known as the "Lower East Side harmonica" bug. What a downer, that I couldn't even finish the game. They have yet to release a bug fix. So all that time invested in a cool game for nothing. I have heard that Xbox players have the same problem with the game. Tech support says to go back to Chapter three and do over half the game without doing the side mission. Sorry, but that is not a fix in my book. I have a stack of 10-20 games I want to play more and/or finish, and 100+ DVD/HD-DVD/Blurays in my collection of over 500 that I haven't even watched yet. Plus working! Plus my family (new baby included). Plus having somewhat of a LIFE! I don't have time to play through such a game TWICE! They need to fix it. So..... my first experience with a PS3 game has not been a good one. I know it isn't their fault, but their are at fault for not pushing to get better games out there. I will buy MGS4... I am a huge fan of past Metal Gear Games and have the PS3 already, so I will buy it and, hopefully, finish the game.
As for bluray, you may or may not know how I feel about that, but we are stuck with it. So I am glad I have a good bluray player that I can count on in the PS3.
With a no interest deal for 24 months with CompUSA before they went under a few months ago, it was well worth purchasing my PS3, even just as a Bluray player.... the games, like this one, are just a perk. Like, "oh year, it can play games too."
For me it boils down to, if the game is available for Xbox360-PS3 and or Wii, I will always buy the Xbox360 version. If it isn't, I would buy the PS3 version, and lastly, I would buy the wii version. But pretty much, wii proprietary games are the best for that platform. Good stuff you can't get anywhere else.
PS3 has to hit hard with this game if it wants to be considered a gaming platform...... they can't go on forever just as a bluray machine!