Pre-recorded cassettes seemed to be of unreliable quality. Some were OK, but quite a few were dreadful. The quality was generally noticeably inferior to that obtainable from widely available blank cassettes.
Throughout most of the 80s I usually bought LPs and recorded them to blank cassettes. To begin with this was to preserve the vinyl (if I was going to damage or wear out something, I'd prefer it to be a cassette : even decent quality cassettes at the time only cost about 1/5th that of an LP). This strategy carried on (and made even more sense) after I passed my driving test and bought a car with radio/cassette player, and when I bought a portable cassette player for journeys to work.
I wasn't won over by chrome cassettes (let alone metal ones), and preferred high quality ferric ones. Started off with TDK OD cassettes, which were superceded by the AD-X variety around 1982ish(?). The branch of Comet in my home town decided to sell off all their OD stock cheaply when TDK were replacing it with the AD-X ones, and I bought boxes of them for a pittance. Kept me going for years!
Later on also used Memorex, and Sony ones (AHF?).
My deck had Dolby B & C. I discovered I got the best results recording cassettes with Dolby C, but playing them back using Dolby B (particularly in noisy environments such as cars & trains). I think it either caused everything to shift to a slightly higher audio frequency, or emphasised the higher frequencies (which were easier to discern when there was competing background noise).