From best to worst I'd say -
Metal Gear Solid - Classic
Metal Gear Solid 3 - Classic
Metal Gear Solid 2 - Great, although I'm still mad about having to play as Raiden
Metal Gear Solid 4 - Good, but they went a little overboard with the cutscenes and I wasn't big on the Old Snake thing
Metal Gear Solid 5 - Good gameplay, very mid story by MGS standards though
I might have a little nostalgia bias for MGS 1 since it blew my mind when I was in middle school. Really need to go back and finish MGS 5, I might move it up.
Haven't played any of the portable games, but I've heard Peace Walker was good. Haven't played the NES games either.
Metal Gear Solid - Classic
Metal Gear Solid 3 - Classic
Metal Gear Solid 2 - Great, although I'm still mad about having to play as Raiden
Metal Gear Solid 4 - Good, but they went a little overboard with the cutscenes and I wasn't big on the Old Snake thing
Metal Gear Solid 5 - Good gameplay, very mid story by MGS standards though
I might have a little nostalgia bias for MGS 1 since it blew my mind when I was in middle school. Really need to go back and finish MGS 5, I might move it up.
Haven't played any of the portable games, but I've heard Peace Walker was good. Haven't played the NES games either.