[quote name='DirkBelig']
BTW, how long are these games? 10, 20, 50 hours each? MGS4 has already dropped to lower than I paid for it in the time I haven't played the first 3; will MGS5 be out before I get thru the first 4?

[/QUOTE]
Definately play all three of them. First off, Kojima will definitely release a better version of MGS4 sometime.
MGS
MGS: Integral
MGS2
MGS2: Substance
MGS3
MGS3: Subsistence
MGS4
Which is why Wombat proposed that MGS4: Subsandwich is going to happen.
Second, most people would probably say that 4 is the weakest of the series: after the first part, it becomes an action game, not a stealth game. I haven't played it yet, so I don't know if it's true, but it seems pretty universal.
Third, if you don't play them in order, and want to go back to MGS1, you'll be like "WTF is with the shitty graphics?"
Fourth, the story won't have much of an impact if you don't play the games. It'd be like the difference between knowing the Titanic sinks and watching the movie with a bunch of stuff leading into and following its sinking. One will trigger more of an emotional response.
I haven't beaten Metal Gear Solid 3 yet, but MGS2 is my favorite game ever, and MGS1 is my second favorite. So they're pretty good games that stand the test of time. (I played MGS1 for the first time in April 2008, and MGS2 for the first time in January of this year)
As for the play times, I played MGS1 on very easy :lol: and according to the game it was 12-20 hours. (don't remember) I kind of doubt that figure, I think that includes pauses to go look on GameFAQs. I played MGS1 from a Friday afternoon until Sunday at 5 PM. Besides sleep, eating, and some Internet time, that's all I did that weekend. Once I finished that, I started working on a huge project that was due the next day. #-o
MGS 2 I played on normal and it says I took 16 hours. Once again, that probably includes the time it takes for me to pause and look at GameFAQs.
Playing MGS3 right now, and its awesome, but I just started.