Fun to see the wellspring of MGS4 love in this thread. I remember checking GAF a few months after launch and being surprised at the outpouring of hate. Sure, the game's got problems, but I think it's a sum of its parts, and some of the parts are undeniably incredible.
Haha, yeah, lots of stories. One thing I recall was all the PS3 vs. 360 controversy at the time. (If you recall, it was much worse than it is now. I clearly remember having my family threatened by a fan when he became convinced that we were prepping a 360 version.) We had fun with it all though and put in a few easter eggs to stoke that fire, but I'm not sure anybody noticed...
As you all can see, Act III had the most problems. Credits goes to Shinta Nojiri for coming in at the very last minute and greatly improving it. He practically lived at the office for the final 60 days.
Overall, I remember being really worried about the game upon ship because of the cutscene-to-gameplay time ratio. I wanted the entire game to be like Act I & II, but I think the desire for a lot of special case fan-service stuff won out. I'm still really proud of the game and the controls, actually (they were drastically improved over what was originally intended to ship). Still don't have the urge to play it again though. Maybe on its 10 year anniversary?