MGS4 for me. It had enough stuff to keep me going for hours on end.
Game had a load of throwbacks to the previous titles in the series, as well as tying up some loose ends. That and I really loved the Gekko/Frog designs, as well as the OST and the camo suit.
the end... it was so impressive and sad. so many tears : ( maybe the saddest end of all time.
I tend to go back and forth between MGS1 and MGS3, but those are my top 2 games from Kojima.
interesting opinion :) The Para Medic Conversations was really funny : D She died later... thanks Gray Fox ^^
The Jungle in Metal Gear Solid 3 is so wonderful.
Snake Eater, easily. It was the pinnacle of Metal Gear. Great OST too.
oh yes, the Metal Gear Solid 1-4 Ost is legendary :)
The Last of Us 2, so beautiful <3