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.
Audience-Alienating Premise: Tusk confused a lot of people who wanted another slick pop-rock outing in the vein of Rumours, even if it was Vindicated by History as a classic of experimental pop. The fact that it was a double album made it even worse.
Rumours. Created by five people who had no sane reason to be in the same room with each other, writing lyrics about the break-ups and emotional trauma within the band itself. They crafted one of the best-selling and popular albums - filled with some of the bitterest out-of-love and beautiful falling-in-love songs - of all time.
Many to choose from but "Rhiannon" and "Go Your Own Way" stand out. The live versions of both "Rhiannon" and "I'm So Afraid" also count.
"The Chain" as well.
The Dance is pretty damn awesome for being the reunion of the band's classic lineup. The last two songs on the album, "Tusk" and "Don't Stop" are accompanied by the USC Marching Band (who performed on the original studio version of "Tusk") and they are just glorious.
Broken Base: Between the fans of the Peter Green/Jeremy Spencer-era blues band and those of the Lindsey Buckingham/Stevie Nicks-era pop band.
Covered Up: "Black Magic Woman" (Santana's cover is arguably better-known than the Mac's original) and "The Green Manalishi (With the Two-Pronged Crown)". "Rhiannon" and "Landslide" have also been covered by various artists, but not as famously.
Santana's "Black Magic Woman" has almost certainly Covered Up the original in the US; the Mac version was more popular in the UK though, so it is more arguable there.
A lot the younger generation (those born in the 90's) seem to think "Landslide" is a Dixie Chicks song. And "Dreams" is a Corrs song.
Crazy Awesome: Mick Fleetwood. He seems sane and coherent enough in interviews, but just watch any live performance for long enough, and there you have it. The man is a beast, and you can only love him for it.
Lindsey Buckingham as well. A very extroverted, energetic performer who throws himself into every performance, sometimes a Control Freak (or at least very meticulous in the studio) at one point certainly having a Hair-Trigger Temper when pushed to the edge. He is also a very talented, unique singer and songwriter who helped to produce and arrange the band's songs.
Though that's it's own piece, and Peter Green considers it the only important part of "Oh Well", even originally wanting it to be the first part.
Face of the Band: Peter Green from the original blues lineup. Stevie Nicks is the best-known member from their most successful pop/rock era. Mick Fleetwood is also one, simply because his height makes him easy to notice. It doesn't hurt that the band is partially named after him, either.
Narm: Mick Fleetwood's vest solo, as seen during the Tango in the Night tour.
The Buckingham/Nicks lineup has an odd habit of putting out things with the same title as existing Fleetwood Mac releases:
2 albums titled Fleetwood Mac
2 albums titled Live in Boston
2 songs titled Only You
The 1968 album Fleetwood Mac has a song called "The World Keep On Turning", and later, a song called "World Turning" was released on the 1975 album Fleetwood Mac (The latter was definitely inspired by first somewhat, in this case)
Signature Song: "Albatross", "Oh Well", "Rhiannon", "Don't Stop", "Sara", and a few others.
Song Association: "Seven Wonders" is suddenly popular with samplers - Pictureplanes' "Goth Star" and Classix' "Hanging Gardens" feature the main riff prominently - and Nicks' "American Horror Story" appearance made a minor meme of the title.
Although decades later, with the advent of digital media to store and play music, radio stations began to actually do this occasionally with album releases. So that executive may be Vindicated by History, making the Tusk incident Hilarious in Hindsight.