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.
Also some hated the 90's, but not because they were the 90's, but because it never fully embraced the 90's. The 90's era never really fully embraced Hip Hop (neither did the 80's for that matter). It did marginally better with other urban genres like New Jack Swing. But over all the 90's was not a huge pop culture reference pool like the eighties, and seventies eras were. Essentially alienating the black MTV generation. Because of this people think this is what led to the show's down fall.
Ensemble Darkhorse: Several, but the best known is Carol Song aka "the Asian chick with the hair".
Jump the Shark: Most people point to Cornelius giving up hosting duties.
Replacement Scrappy: After Don Cornelius stepped away from hosting, every subsequent host was tolerated at best by the fandom.
The Scrappy: Any white male dancer in the Soul Train Line. Bro, give it up — you can't dance.
White women tended to avoid this Trope, holding their own on the dance floor.
White singers were tolerated, but only a few of them (including Elton John, Michael McDonald and David Bowienote hilariously, as he was transitioning to his aristocratic, "emotionless Aryansuperman" "Thin White Duke" phase) were deemed worthy.