MGS2 was really fun gameplay-wise. I haven't replayed it since two play throughs back when it first came out (though I did replay the Tanker section a few more times -- definitely the best part of the game), but I did enjoy the game. Raiden was a bit of a let-down, but mostly just because he wasn't Snake. I didn't love him, but I didn't think he was terrible by himself. Rosemary, on the other hand, was unbearable. The plot was another weak point, as has been mentioned. But I still consider it a good game, despite the common derision.