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: Jethro Tull
Awesome Music: Obviously Aqualung and Thick As A Brick, also A Passion Play and Songs From The Wood.
Heavy Horses and Broadsword and the Beast, and that's not even getting into individual songs.
Face of the Band: To the point where people think Jethro Tull is the guy's name. It's Ian Anderson. Jethro Tull is a person's name, but he's an historical figure known for inventing the seed drill. It's comparable to assuming that Franz Ferdinand is a solo artist.
Growing the Beard: The inclusion of guitarist Martin Barre (during Stand Up) and keyboardist John Evan (during Benefit), which greatly expanded and tightened the band's sound.
Harsher in Hindsight: Too Old To Rock 'N' Roll: Too Young To Die! marked the first appearance of Tull's third bassist John Glascock. Three and a half years after that album; he passed away at age 28; not too old to rock 'n' roll, but certainly too young to die.
Ho Yay: For decades a live concert staple has involved Ian Anderson sticking his flute between Martin Barre's legs in a distinctly phallic manner, and fiddling with the protruding end of it for a while. Generally this ends with a disgusted look at the free hand, then wiping it as if now covered with something very sticky.
This site goes through A Passion Play line-by-line.
What Do You Mean, It Wasn't Made on Drugs?: Quite a few commentaries about the band's history like to imply that Anderson was on drugs of some kind. The fact is that Anderson doesn't do any drugs at all and only rarely drinks. In fact, he has claimed that his few experiments with drugs hindered his creative process.