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.
YMMV: Fairy Dance Alternate
Arc Fatigue: The chapters focusing on Asuna's monologues about her life after SAO have been criticized for being too long or being a series of Wall of Text especially those who are waiting for the part where Asuna and Co. goes to rescue Kirito in ALO. It didn't help when the next arc was about Kirito's time in ALO which many felt should have been done earlier rather than making more chapters of Asuna.
Ensemble Darkhorse: Subverted because Kirito and Asuna are the most popular characters of the story according to Knowledgeseeker66's popularity poll, but there are a number of characters who are popular with the fandom for this story.
Yui, Silica, Klein, and Lisbeth took up the following placements in the poll.
The original character Hideyoshi has some popularity. This is most likely due to how he hates Sugou, and some readers find him more interesting than Sugou.
Knowledgeseeker66's depiction of Asuna's brother, Yuuki Kouichirou, has earned a fair number of fans.
Moral Event Horizon: Similar to canon, Sugou passes that line on several occasions. Knowledgeseeker66 made a poll listing more than ten acts he committed during Chapter Five asking the readers to state which acts he committed that disgusted them the most.
The Scrappy: Based on numerous reviewers, Sugou is generally despised by the fandom. Some have even gone on to say they hate him even more in this story.