New Super Luigi U was amazing. Is Alan Wake: American Nightmare a DLC too? If so, it was great as well. Oh, and I enjoyed Far Cry 3: Blood Dragon more than the original game.

I don't like any kind of DLC at launch. Itens, Weapons, Visual... If it's ready to go, then just add it to the main game and make it an unlockable. Geez...

And I also don't like whatever the heck Capcom did to Street Fighter V.

From what I've played.

The best.
FFXIV patch updates, and expansions.

The Worst.
Final Fantasy XV: all of it.

Bestest. Shovel Knight extra campaigns, New Super Luigi U, Mario Kart 8.

Worstest. 3DS Fire Emblem, Atelier games. Any RPG that locks costumes behind paid DLC, really hate that with the more recent Tales of games.

Monster Hunter iceborne and Witcher 3 blood and wine were the best for me this gen.

In recent years...

Mario Kart 8 was great. 50% extra game for 12 bucks... amazing deal.
Bloodborne: The Old Hunters was a great expansion worth every penny.
Shovel Knight is like... unreal. They didn't need to give us so much... but they did anyway.
Donkey Kong Adventure in Mario + Rabbids was an insanely good expansion
Torna: The Golden Country is pretty much a full on game disguised as a DLC expansion. And in some aspects it's even better than the main adventure. Also, we got a ton of new content for the base game
Splatoon and Splatoon 2 spent years giving people free updates with weapons, maps, game modes, events and more. And Splatoon 2 got a nice (paid) story expansion

That's the good. The bad...

Both Smash Bros. Ultimate and Smash Bros. 4 have awful DLC. I don't care how much it costs to make new characters and stages. 25 dolars for a 6,6% increase in overall content is ridiculous. And Smash 4 was even worse, with the pack with all characters costing 35 dolars. 35. Wow.

Zelda Breath of the Wild Expansion Pass was not bad in terms of content. But it is bad to lie to people. They promised "a new original story". I don't know what Nintendo understands by that... but what we got was not a new original story. And I'm very disappointed with Nintendo for that.

Pokémon Sword and Shield Expansion Pass will be massively disappointing as well. I know, I'm saying things I can't prove yet. And if I'm wrong I will eat my words, I promise. But I strongly believe that they will give people like... a few hours worth of content. Like... twice the Delta Episode duration at best. And then all what will be left is catching the new Pokémon and go back to the competitive aspect of the game. All for 30 bucks. And then people will miss a well made third version (not like US/UM).

Worst: The TES: Oblivion Horse Armor. It gave publishers way too many bad ideas about monetisation

Best: Mario Kart 8. Practically doubled the game for peanuts.

Don't know if I agree with the Spider-Man DLC but then I look at my own experience. I pre-ordered the deluxe version and, to the day, I haven't finished the DLC and have no desire to do so. I DO want to replay the main story, though.

My vote for worst DLC goes to Magna Carta 2 on the Xbox 360. Why?

-You can't get 100% Achievements in the game without it. Most games that I know of let you get 1000gs and any DLC is extra. Without this DLC I think the most you can get is like 800gs.

-It's horrible. It adds absolutely nothing to the game. Instead you get these comedy "skits" and all you do is watch them. You ever play a JRPG where two characters just talk back and forth but it's just pictures of the characters in front of a background? That's it. That's what you pay money for and you get Achievements just for watching them...but I didn't watch them. They were so bad, I skipped them and still got the Achievements.

Let me maybe clarify what I meant about Spider-man's DLC.  

First off, before getting the DLC I had already platinumed Spider-man. That means by this time, I'd already done  tons of warehouses, all of the Taskmaster challenges, stopped crimes in every district, and so on.

If someone hadn't played the game before, there would be nothing wrong with the Hammerhead bases in the DLC.  The combat is of the game is good enough that beating waves of enemies is pretty fun.  But even something that's fun gets boring when you do it enough.  By the end of the game, bases were already wearing on me.  Last thing I wanted to do was pay for more of them.  Ditto for pretty much everything else of the side activities.  And if I did want to do more of this stuff, I could have started a new file and raided enemy bases to my heart's content.

Sure I could just play the DLC for the story.  The problem with that is twofold.  First of each DLC pack took me 2-3 hours with doing the side missions.  I'm pretty sure I could beat each of them in an hour or less without doing those.  Which is a pretty terrible value.  And even then, the story content really isn't that good.  The villain was uninspired, the gameplay didn't offer much of a twist on the formula, the one boss fight was probably the worst in the game, and aside from maybe Black Cat, there's not a decent character arc to be found.

At the end of the day if I really wanted to play more Spider-man, I could have just made a new file.  To be worth it DLC has to offer something beyond that, or what's the point?  If someone today offered me ten bucks to play through the City that Never Sleeps, I'd probably turn them down.

I liked the Donkey Kong DLC for Mario and Rabbids but was kind of irked that the only character you could use from the main game was Rabbid peach.  I was really hoping for a chance to use the late game characters like the Yoshis since you didn't have a chance to use them much in the main game.

I don't think measuring value by percentage of characters is a good way to go about things, since this kind of penalizes developers for giving a lot in the main game.  For instance Soul Calibur 6 I believe has the same pricing for their DLC.  But since the game launched with I think 20 characters, you'd be paying 25 dollars for a 25% increase in overall content.  Which would sound like a better deal, but in reality you're getting the same amount of stuff. 

The Thing is soul calibur is likely giving less content for the same price. Smash for 25 is giving 5 characters, 5 stages, 100 music tracks, over 40 spirits and 5 classic routes. While I would rather it be cheaper, i think it is much better value for money compared to other fighting game DLC.