YMMV: Hatsune Miku Project Diva

  • Breather Level:
    • Miku Miku ni Shite Ageru is the penultimate song of 2nd, and it's far easier than what came before, and what comes after.
    • Continuing Dream in F, very merciful for a (non-Extra) final song, especially with the two hardest songs in the game coming before it.
    • F 2nd has the un-intensive The World is Mine and DECORATOR sandwiched between two particularly brutal duos (see That One Level).
      • Notably, All three games had a penultimate or final song by cosMo...
  • Ear Worm: Too many to list. We are, after all, dealing with a rhythm game drenched in J-Pop.
  • Fake Difficulty: Quite a few examples. Even if you know a song by heart, some song charts practically require the player to be familiar with them to not slip up on its notes.
    • Any song with a PV with a lot of colorful movement going around in the background, making it more difficult than it should be for the targets and incoming beats to be seen. A particularly evil example happens with World's End Umbrella just after the Chance Time star. The title card appears, the song goes completely dead, as if the song is over. PSP veterans would put the controller down and consider the song over, and that they missed some notes... when actually, it's a fake ending, and, on Extreme, they'll miss several notes anyway!
    • Overlapping notes. One egregious example is in Luka Luka Night Fever in F 2nd. On Normal/Hard, the "Lu-ka Lu-ka" (Night Fever) parts of the song are overlapping A-B-A-B notes (e.g. square-X-square-X). A little sneaky at first, but entirely manageable after the first instance or so. On Extreme, this trend continues, with the slight twist of making the B-notes doubles instead of singles... until you get to Chance Time, where the notes randomly switch to an A-B-B-A format instead. While still overlapping. Completely out of nowhere. Fake Difficulty at its finest.
    • In F 2nd, gimmicky linked star notes. It's not really clear how fast you need to flick a sequence of linked star notes until you experience it for yourself. One of the best examples is in F 2nd's Knife, which has a simple two-linked-star note sequence, symbolizing a sword slash. There's a fairly long line in between the two notes, but the star travels along the line blindingly fast, so you actually have to flick twice in rapid succession, and not with a pause in between as the line between them would have you expect.
    • Adding to the above, there's also linked star notes that overlap. Thankfully, since you're just flicking either way and these usually still follow the beat of the song, combined with the fact that the timing on star notes is more relaxed than regular notes, these usually aren't too bad.
    • A lot of these are lampshaded in the Extreme version of the tutorial song, Ievan Polkka.
  • Fridge Horror: Miku may be a tyrant in Sadistic.Music Factory, but she's also doing what she does simply for the sake of survival and escaping the factory (not getting the Chance Time bonus) means leaving her to starve to death!
  • Les Yay: Miku and Rin have a lot of this in the bonus materials for the games.
    • In Project Diva F and F 2nd, many of the Miku and Rin duet songs are heavily on the shipping, with Summer Idol having them consider going out with each other, and singing about how they like the other in Colorful X Melody.
  • Most Wonderful Sound: "PAAFEKUTO!", and to lesser extent "EKUSELENTO!".
  • Nightmare Fuel: The music video of Sadistic.Music Factory in F. The song itself could be pretty scary if one takes into account the lyrics (which are about being trapped in a factory and forced to make music for a mechanical tyrant for the rest of one's life) and the frightening robotic monotones, but combine all that with the Chance Time ending...
    • The Disappearance of Hatsune Miku, which has the song become garbled, as well as there being interference and odd glitches in Miku's movements, constantly. According to Word of God, Miku is being deleted while attempting to complete the song. The end of the song is when she finally crashes due to it.
    • Toward the end of Disappearance, Miku can be seen banging at the screen with her fists as though begging the player to help her. And at the end, she says a cheery goodbye before just...freezing up with a sad smile on her face as her voice speaks eerily in the background.
      • Thankfully averted with its answer song, The Intense Song of Hatsune Miku, where the full length version's opening lyrics have Miku celebrate being alive, and she promptly finds a solution to the bad ending of Disappearance with one of the fastest denouements in Vocaloid history!
    • The entire video of Kagerou Daze wherein Miku stumbles onto the site of an accident and repeatedly gets killed or injured trying to avoid the domino effect of everything that goes on. Sure, it's a Catapult Nightmare for each event so she knows how to avoid it next time, but the video still ends with an accident on stage and Miku vanishing completely.
  • Scrappy Mechanic:
    • The star links in F 2nd aren't proving to be very popular. Their timing is often inconsistent with the rest of the song, either much faster or much slower, which throws a lot of players off on their first try. As well as many, many tries after that.
    • Chance Time in the original PSP game can feel like this at times as missing a single note on it in several songs is what could very easily separate a Standard and Great score.
    • Unlocking the Hard and Extreme charts for a song require clearing its Normal and Hard charts, respectively. This is a source of frustration for players who have played previous games in the series and are more than capable of playing Normal charts. It's also frustrating for players who find the two-button Normal charts bland in comparison to the four-button Hard and Extreme charts.
    • Several of F/F2s Trophies can become this not due to difficulty, but because of grinding. For example, both of them has a trophy requiring you to view all loading screen images... with over 100 different pictures this can make it really annoying waiting for the one final picture to show up. Another one requires you to view every single music video in the game, and using the playlist to play them automatically after each other doesn't work - you have to manually start each of them.
  • Tastes Like Diabetes: The inclusions and actions of the chibi Vocaloids in "God-Tier Tune" make it the most adorable apocalypse ever.
    • Love-Hate" in F 2nd is made of this.
  • That One Level: As mentioned above, Sadistic.Music Factory and Negaposi*Continues in F. The beats are fast and the targets come almost constantly. You have to be on top of the rhythm the whole time, or else you'll find yourself failing out very quickly. Also, to a lesser degree, Nyanyanyanyanyanya! and Rin-chan Now. The former has constant shifts in tempo, while the latter is fairly chaotic, and both songs have intense Chance Times.
    • The Breather Level songs in F 2nd are preceded by Two-Faced Lovers and Envy Catwalk, both demanding songs with lots of rapid notes. Being skilled at dual-wielding is practically a necessity if the player hopes to successfully clear them. Furthermore, the final two songs in the game are The Intense Song Of Hatsune Miku and 2D Dream Fever, which have "intense" BPM and chaotic charts. Although, the F 2nd version of "Intense Song" is not quite as difficult as before, having removed all the longer chains, though it is still tricky to master.
    • Pretty much any cosMo song qualifies. In addition to Sadistic.Music Factory and The Intense Song Of Hatsune Miku mentioned above, there's also the (in)famous "The Disappearance of Hatsune Miku" in the first game and extend (more so in the Miku Flick spinoff).
    • A new challenge item removes the short delay between a note arriving and needing to be played, meaning you'll fail a song, guaranteed, on your first try purely since there's no warning that you need to play the next note.
  • Woolseyism: Several instances of this in F. For example, one song that would literally translate to "Left-Behind City" was named Urbandonment, and Remote Control became Remote Controller, which is appropriate given the video has the Kagamines controlling each other through their devices.
    • In F 2nd, Narisumashi Genga, normally translated as "Spoofing Genga", became the punny-named Doubleganger.