pop'n music Lapistoria's new art style. Some enjoy it, others feel it's just not the same as the same style used in previous games.
Whether to refer to songs by their name or their "genre". The latter seems to be falling out of style as Lapistoria onwards no longer assigns genres to new songs.
Is playing with Beat-Pop (a note style that replicates the bichromic note style of beatmania rather than pop'n's four-color note style) cheating? Or it an acceptable way to play, especially given that it doesn't disqualify or reduce scores?
It's Easy, So It Sucks!: When the scoring system was made easier for Lapistorianote previously, the Cool-Great-Good-Bad scoring ratio was 10:5:1:0; as of Lapistoria it is now 10:7:4:0, players were very, very unhappy, although part of the complaints stem from the fact that pre-Lapistoria songs are nearly impossible to convert to the current scoring scale without having the accompanying judgement counts on hand.
For many players, pop'n is an extremely daunting rhythm game series, right up there with beatmania IIDX. It's only saved due to having a visual style that appeals to a wider audience as well as a number of recognizable licenses, two factors that help draw in players in spite of the game's notoriously hard boss charts; IIDX meanwhile comes off as looking more "technical" due to its interface designs as well as having mostly in-house and comissioned songs that the average arcadegoer will most likely not recognize.
Beginning with pop'n music 20 fantasia, the COOL judgement is forced in Normal mode. This has led to even higher-end players complaining, as having COOL enabled means that a performance that otherwise nets a near-perfect score with COOL off can become a measly 50,000-60,000 pointsnote The max score is 100,000 play when COOL is enabled. Even after Lapistoria made the scoring scale more lenient, players still long to be able to use just the three lowest judgements.
According to That Other Wiki, pop'n was originally intended to be played by couples on dates.
In a more relevant example, most players are adults or at least teenagers.
Scrappy Mechanic: Almost nobody uses the Random modifier (shuffles notes on a per-column basis) simply because of the "impossible" chords that can result; chords are always designed to be hittable with only the hands and a chord like white-red-white, which can be the result of a bad randomization, requires using the player's elbow to successfully hit. This is in contrast to beatmania IIDX, where most at the highest levels of play never play without Random.
Shipping: Nyami and Mimi are frequently coupled with other Pop'n characters, the most common ships being those with MZD, or each-other.