If you didn't like the length of MGS cut-scenes, then god forbid that you will ever play the Yakuza series, now that is a pure story game right there. Every cutscene drags on, and on, worst of all, most of them are not even intriguing like the cutscenes of MGS, and most of the time you don't even know what the hell is going on in the storyline.
If you ignore most of the Nanomachines and Foxdie stuff then MGS's plot is fairly easy to understand, unlike Yakuza's.
Why people feel the need to compare videogames to movies is lost to me. Remember videogames as a medium is still young, and isn't even mainstream accepted yet, so downplaying videogame stories in my eyes is rather silly. At least the MGS storyline was trying to become like a movie with it's cutscenes, and not the typical save the princess, or see this guy, shoot this guy, like what most games are. It's games like MGS that makes the power hungry Hollywood shit themselves, and that's why we need more like it. It also helps push the medium into a more mature way of thinking, and helps inspire mature titles like Heavy Rain that are not all pew, pew, die, die childish nonsense that is commonly associated with videogames.
MGS is a case of videogames growing the fuck up, and perhaps gamers should as well to some degree, and embrace story heavy games.