Personally, DLC is one of my favorite things about modern gaming... When it's done right.  In these cases it could expand already excellent games in situations where a full on sequel would be either impractical or impossible.  Of course, on the other hand, when it's done wrong, it can make an incentive for developers to chop a piece of the game out to be sold separately, or deliberately throw the balance of a game off in order to encourage microtransactions.

So what are your favorite and lease favorite examples of DLC?  Here are mine.

BESTEST

New Super Luigi U

New Super Luigi U doubles the amount of levels in New Super Mario Bros U (although they are a bit shorter), provides a more challenging quest for long time, and adds a playable character who is absolutely perfect for younger players.  Launching at $20, Luigi U gave a pretty hearty amount of content at a very reasonable price.  I honestly think it was more enjoyable than the actual game.

Mario Kart 8

Another example of a game just adding more content at a good price.  Mario Kart's DLC added 16 extra courses to race through, and finally brought characters from outside Mario to Mario Kart.  Nothing all that special, but there's always something to be said for good content at a good price.

Mass Effect 3 Citadel

This one straddles the line a bit, because while it's not exactly content that should have been in the main game, the game's ending left a sour taste in most mouths that contributed towards the franchise's apparent death.  Citadel is sort of a part of what the ending should have been.  It doesn't offer any real closure for the story, but it provides the chance to say goodbye to the game's characters that the main game doesn't offer.  It's entirely fan service, but when you have such a great cast of characters, that's not necessarily a bad thing.  Last time I replayed the series, I actually just played the Citadel DLC before the final mission and left it at that. 

WORSTEST

Spider-man The City That Never Sleeps

More of a great game can be a good thing, but only when the price is right, and the new content adds some kind of neat spin to the main game.  And here, it really doesn't.

The City That Never Sleeps is decent, because Spider-man PS4 is a great game.  But unfortunately, City That Never Sleeps offers more of the stuff you'd already done.  After going through the main quest, I didn't need to bust up any more henchmen hideouts, stop any more random crime, and I really didn't want to do any more Taskmaster challenges, especially with an annoying chick screaming at me the whole time.  TCTNS offers very little to differentiate itself from the main campaign, doesn't offer any new gameplay mechanics or upgrades to reward you for playing on, and the story is just ok.  While it's fun to see Black Cat, generic mobster Hammerhead is a painfully boring adversary, and it feels like he was simply chosen so that they didn't have to waste one of Spider-man's A list villains who could be used in the sequel.

Mass Effect 3 Microtransactions

There's nothing inherently wrong with a multiplayer mode, but sometimes it can ruin a game.  Mass Effect 3 added a decent but kind of generic zombies mode-esque multiplayer mode to supplement the campaign.  To make sure that you played the multiplayer mode, they made sure that you essentially had to play it in order to get the "best" ending. 

And why were they so insistent on getting you to play this mode?  To get you to spend money on microtransactions of course.  In this mode spending money is a far surer path to success than skill and practice.  

To be honest, I probably wouldn't have minded this.  But perhaps if they spent less resources on this cash grab and more on actually finishing the campaign in a sensible way, the franchise would still be alive.  

So, those are mine.  How about you?