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.
Most Annoying Sound: The "BAH!" sound that permeates most of the music in the series to some, mostly because of it's omnipresence.
Sequelitis: Didn't really get this reaction until Nintendo announced a third and fourth game to be released in the same year. Many people began to deride Nintendo for over-relying on the sub-series, if not Mario as a whole, derisively being compared to the oversaturation of the Callof Duty series. For reference, New Super Mario Bros. launched only in 2006, and in less than a decade has now accumulated more installments and DLC than series that have been around since the N64 era, like Paper Mario or Super Smash Bros.. Though, this hasn't stopped each game from being commercial successes. Make of that what you will.