Reason I bought a PS3 :)
It makes Konami way to much money to do that
This game has probably the best graphics I have ever seen and an amazing story. This is the problem for some. I am a huge metal gear fan and like RPGs and this game sometimes will feel like your playing a role playing game in the sense that you play for 10 minutes and then there is a 15-30 minute cut scene. I loved the cutscene and think that it tells the game very well but again this is a shooting game not final fantasy so some people might not like that.
The game take 20-30 hours the 1st time depending how fast you go and taking into account you watch all the movies. It has alot of unlockables that gives the game alot of replay value but if you skip all the movies, know how to beat bosses and where to go I say you can beat it under 5-6 hours..... really speeding threw it you can do it in under 3(I do)
There are alot of ways to do different things but for the most part this is the exact gameplay you had in Metal Gear 3 with a few things added to it like gun customization and a few more crawling options.
Metal Gear tho is a game that you need to like a good story or its going to be annoying..... and you can play it like you want.
If you want to be Rambo and just Run and GUn ... you can do that depending on how hard you have it set.
or you can be batman and just stay in the shadows and not kill any one.... its up to you which makes the game great