I did like you OP.
MGS is boring as shit, don't listen to the fanboys.
MGS2 is somewhat decent but so fucking repetitive, the situations are all the fucking same and the stealth isn't deep enough to keep the game entertaining.
MGS3 has interesting mechanics but the movement, camera and playability is all over the fucking place, you have to open the menu or the codex every 10 seconds, if you crouch and want to move by pressing the stick forward your character will not walk but instead switch to a crawling position then crawl forward it's so god damn frustrating and retarded and the whole game is plagued with shit like this.
Peace Walker is literal shit and throw away the few things the MGS game had for them (nice presentation/original story/interesting bossfights) every area is rehashed to hell, the mother base gimmick is nothing but repetitive shit.
MGS4 I played for like 30 minutes. Gameplay seems improved, but there is a cutscene every two meters and I've heard it's even worse later in the game.
To this day the only Metal Gear I've finished is Rising (and GZ but this one doesn't count right)
Don't skip it.