Metal Gear Solid is my favorite series.
Only counting the Kojima´s games and not counting MG1 and 2.
MGS 1 -94
MGS 2 -96
MGS 3 -91
MGS 4 -94
MGS PW -89
MGS 5 -93
My rank is MGS1>MGS3>MGS2>MGS4>MGS5>MGS PW
Kinda agreed with the metacritic scores.
My personal scores would be:
MGS 1 -99
MGS 2 -96
MGS 3 -96
MGS 4 -92
MGS PW -81
MGS 5 -89
The biggest difference would be Peace Walker. I don´t really like portable gaming.