In my (many) MGS1 playthrus, I always artificially drew the game out and called codecs every 5 seconds to hear every possible speech.
Explored every inch of the game. Didnt want it to end.
I do wish there were longer and more areas - the game never really lets you flex with its gameplay.
The gameplay there is so fun - I just wish there were more floors and rooms to play in.
Actually it wasnt until MGS3 where we truly got bigger/more areas to tinker around with. MGS2 was so cramped and compact as well.