Well I picked this up last night, and played through some of MGS2 and Peace Walker. MGS2 was exactly what it was billed to be--the same game as before with pretty much the same character models, animation, music, voices, etc., but upgraded to look good on an HDTV. I guess that's no surprise to people, but I was kind of hoping the characters would have a bit more fluidity/realism to their movement, etc. When Snake lands on the ship in the opening scene, for instance, his wrists still look funky as hell. Kind of underwhelming after playing for an hour or so. MGS 4 probably spoiled me a bit. Same goes for Peace Walker. First time I played that one, but the controls felt a little less sensitive than they did on other MGS games and the animation, again, nothing to write home about. Graphics looked good of course, but the angular, pixelated trees, etc. were still there from the original I guess. In terms of story, Snake's motivations and relationship to blonde guy with the ascot or whatever are a bit puzzling to me. Maybe it will make more sense as the game progresses, but thus far it doesn't feel very well thought out on the order of the stories of the other games.
Saving the best (MGS3) for last. Will probably start on that once I finish up Arkham City.