Peace Walker's great, my second favorite game in the series. It has all the production values of a numbered game, just on a portable system instead of a console. It's easy to see where the sacrifices were made, but it's also easy to see how it could have just as easily have been a console game. Not perfect, but it's the most gameplay-centric game in the series, Solid or otherwise.
MGS3 > PW = 1 > 2 > 4.
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"When I was a young man, I had liberty, but I did not see it. I had time, but I did not know it."