Summary: There are a ton of reviews for this game, so I won't go into depth when you can find more here. I will just give my opinion. Fast, furious, and funny as hell. Borderlands 2 is a fantastic game! It is by far the premiere social FPS/RPG out there. The GotY edition ups the ante with the Expansions(very good!), extra gear(it's poop), New classed(decent), and skins(meh). The first two times through the game, and expansions are excellent.
Summary: Very fun game. It has everything you would want in a coop game. Over the top storytelling, gore, responsive controls, and the ability to customize your character make it a must own. I haven't played any of the DLC, but I'm sure it would only add to the 100+ hours you already get out of this game.
Summary: One of the most fun games on xbox 360, in my opinion. I love first person shooters and diablo, and this combines the two perfectly while adding humor making it, and the first borderlands, some of my favorite games. The action is fast paced and somewhat cartoon-like, but challenging. And despite the bright colors and humor, this is definitely a game for adults with some crude language and adult themes (that are all hilarious).
Summary: Excellent gameplay. Simply one of the most interesting shooters I've ever played. I was worried about all the complexity in the game (see YouTube videos about this game) but I warmed up to it and I'm glad I stuck with it. Very fun game that I could play for hours if my wife didn't stop me... Well, actually she has to stop herself too because we always play together. Co-op all the way.