Biggest Problems with New Super Mario Bros Series
Ah yes New super Mario Bros. The series that was supposed to reflect the classic games (Super Mario Bros, SMB3 and Super Mario World) but it falls short for several reasons.Side note: The original game (DS) is actually decent. And Luigi U doesn't count

NSMBU is the easiest game ever. I feel like every world has the same difficulty, and it doesn't get any harder. World 8 only has four levels before the castle, and I was able to pass the castle very quickly.
The Bowser fight in NSMBU was essentially a rip-off of NSMBWii but easier. Can't they come up with something else for the final castle fight besides the predictable first fight where Bowser falls into the lava, and Kamek makes him huge for another fight?
NSMBWii actually has some really challenging levels like World 7 tower, World 8 Level 5, and World 9 Levels 7 and 4. Besides that, the levels are just too easy.
In the first game:
1. Peach is captured.
2. Go through seven worlds and fight Bowser Jr. and some random bosses.
3. Go through World 8 and fight both Bowser Jr. and Bowser.
Summary of the New Super Mario Bros. Series:
1. Peach is captured.
2. Go through seven worlds and fight the Koopalings.
3. Go through World 8 and fight Bowser.
4. Rinse and repeat.
Bowser or Bowser Jr. easily kidnaps Peach right in front of Mario. Then Mario and Luigi go through the same eight worlds, fight Bowser and Bowser Jr., hit a button or an axe to defeat them, and then the Princess is saved. The End!
Yes, I totally agree. NSMB2 and NSMBU are both perfect examples. It feels like the same game with mediocre gimmicks.
They need to use good female characters like Toadette, not ones like Daisy or Rosalina.
Actually, there are like three new soundtracks. But yeah, the rest is ported from previous titles.
They could have based the music on the soundtracks of the ROM hacks I mentioned.
And for the love of God, can we stop with the "bah" music, please? It's really getting old.

Nothing says innovation like rehashing the same set of seven bosses repeatedly. Not only do these overrated reskins suck horribly, but it felt like I was playing the same game over and over as we kept having to deal with the same seven bosses across multiple games.
Why do Koopaling fans think rehashing a boss lineup of seven is a good idea? It's lazy and uninspired. What's worse is it's the same unattractive characters doing the same thing.
"Turtle twit hurls a projectile and spins in its shell for the thousandth time!" They're awful. Get rid of them.

Even some ROM hackers have made the Sorting Algorithm of Threatening Geography in each post-NSMB1 game less recycled from Super Mario Bros. 3.
These three games could have been like Newer Super Mario Bros. Wii, Super Mario Bros. Next, and Newer Super Mario Bros. DS (or maybe Other Super Mario Bros. U), right?
It is always the same worlds in the same order. It is boring enough that it's the same generic worlds each time, but they're also always in the same sequence: Grass, Desert, Snow, Water, Jungle, Rock, Sky, Lava, and Star. Why can't Nintendo at least mix them up?
The Newcomers
I can't play this game for two seconds. No story, no heartfelt cutscenes, just poorly designed levels and lame bosses. Bad mistake by Nintendo to make this series.
This is the worst thing about the New Super Mario Bros. series on Wii and U. Defeat enemies or collect eight Toad balloons for a prize.
I hate playing as Mario. I much prefer playing as Luigi.
One Toad is fine in my book, but why two? They play exactly the same! Why couldn't they have added Daisy or Wario? Heck, I'd even be okay with Waluigi.