I've just started playing Metal Gear Rising: Revengance
Wow, what a game. I was inspired by Max0r's videos about it to buy it on steam and play it. So far, I've been really digging the combat and the story is hilarious.
I haven't played any metal gear games period and revengeance was great, its not related to the other metal gears story, its a spinoff. Its a hack and slash game with great combat, rather than sneaking around and stuff
I recently played MGS V the Phantom Pain. I hadn't played an MGS in years (since the original and MGS2 when it first came out). I forgot how very cool the story can be, and also how corny some of it can be :D