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.
Contested Sequel: Lumines II adds difficulty levels, a playlist mode, and a "make your own music" mode, but part of the criticism stems from the less varied skins, as all skins' designs are standardized now. The addition of popular songs did not please the It's Popular, Now It Sucks crowd.
Ear Worm: A majority of the Lumines skins, spanning all the games, especially "Shinin'", the first skin from the first game (lyrics at top of page).