These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Awesome Music: The series in general has some pretty awesome tunes, but one of the composer's favorites seems to be first ghost house theme in the first game, which seems to have ended up being the series's standard ghost house music (March of the Minis in particular has multiple variations on that particular track instead of having more than one unique track like the original). The versions from March of the Minis return in Minis March Again! and are joined by a sped-up version of the standard version, with these being used for Plus Mode's version of Magnet Mania in that game.
The Mini-Mario theme is very catchy and has been in every Mario vs Donkey Kong game. In Mini-Land Mayhem, each level select screen got a variation of the theme and the Plus Mode versions were sped up.
Getting a high score in 4-3 is the most infuriating thing about the first Mario vs Donkey Kong.Nothing comes close to the level of bullshit that is this level and whoever designed it is a sadist. Given the way the first half of the stage functions, you have to have almost perfect timing at certain sections, especially in the second half, if you want to just barely beat the default high score by just one or, if you're lucky/good enough, two hundred points (Every second left on the clock is multiplied by one hundred and added to your score). Experience has shown that it is still possible to get the Star (which is needed to help unlock the Expert levels) by matching the default high score. Just don't expect the game to acknowledge it by highlighting your score, because you didn't actually beat the old score.