What is the best mainline metal gear solid?

[TruckOSaurus]

leo-j said:

TruckOSaurus said:
The first one is still the best! The story has just the good amount of plot twists. The characters are very interesting especially Psycho Mantis, Ocelot and Liquid. The gameplay is great (nothing beats hiding in box, beating a guard, have him wake up and say "uh, just a box").

The moment mantis popped up in MGS4, was the moment it became the best MGS for me.

For me that moment reminded me how much I prefer the first one. That and the return to Shadow Moses part where you go back to PS1 graphics.