I've only played MGS1, the GCN remake and Peace Walker. Peace Walker i somehow managed to enjoy and actually finish, but i can't really put into words why ... i find these games are just weird in the amount of crap people accept!
I mean, playing this demo, why aren't any of the alligators in the first segment doing anything? I don't want to get down and dirty with them but it's like, isn't this supposed to be somewhat realistic? Why can i just stroll past 4 of them? It's like instantly destroying the feeling of immersion.
Then later on i alerted a guard & went into a crawl to wait it out. Before it even started to get safe, in the corner of my viewpoint, a guard runs right past me ... it's often unpredictable and flat out retarded to watch it play out.
Then i'm crawling towards a hollow tree to hide, but slightly clipping it causes Snake to stand up and be detected! Ugh!!
But somehow, sneaking in itself is quite fun despite all the crappy mechanics and controls.