Nothing produced after 1975.
Classic Rock: Inside the circle of appreciation:
Yes
Genesis (up to then there were three)
ELP
Jethro Tull
The Who (up to Quadraphenia)
Led Zeppelin
Free
Family
The Stones (exempt from 1975 rule)
Kate Bush (also exempt as she is truly wonderful)
Nirvana (ok I know)
Creedence Clearwater Revival
The Doors
The Beatles (sometimes)
The Small Faces
Cream
Peter Green Fleetwood Mac
probably the odd other band I have forgotten Oh, King Crimson defo.
Outside the circle of appreciation:
Black Sabbath
Deep Purple (other than a handful of tracks)
Marillion (retches)
U2
Bad Co.
Pink Floyd (the Coldplay of their time)
Any Guns n' Iron Maiden kind of crap.
Fleetwood Mac after Peter Green
Phil Collins
The Beatles (sometimes).
Any American crap like t Eagles
I have left out solo acts like Bowie and Lou.
I am, as ever, a man of 1000 prejudices.