You are all forgetting Theodore Sturgeon's indispensable, and infinitely adaptable to other media, Theory Of Science Fiction ~~

90% of sf is crap; because 90% of everything is crap.

When the Beatles, or the Monkees, or whoever [or for that matter Dowland or Schubert or G&S or Bateman&LeBrunn or PorterTheGershwinsBerlinMercer] were writing/performing their songs, they only represented 10%. Likewise Adele [who imo should not be in above list].

~Michael~