Just because Kojima is thinking about making MGS5 doesn't mean it's confirmed that he will. I would rather have him just stop and make a new series or something. The Metal Gear Solid series is fine as is. Too many sequels and it's way too diluted.
MGS1 I played on the Gamecube, loved it.
MGS2 I've played on the PS3 (didnt enjoy it as much as the first)
MGS3 I haven't played because I haven't got a PS2
MGS4 I have played but not completed, and didn't enjoy it as much as 1 or 2. Not enough sneaking around as in the first and second for me...
MGS1 I played on the Gamecube, loved it.
MGS2 I've played on the PS3 (didnt enjoy it as much as the first)
MGS3 I haven't played because I haven't got a PS2
MGS4 I have played but not completed, and didn't enjoy it as much as 1 or 2. Not enough sneaking around as in the first and second for me...