Audio cassettes if they were the higher quality pre-recorded ones or better yet a properly recorded onto blank have a high level of fidelity. I find that the slight added hiss using for example Dolby B on recording vinyl can like the dither added to CD's add a level of depth and air to the perception of sound. On top of that a the slightly higher midband hiss that remains with Dolby B on vinyl recordings can help mask the sometimes rough and crackly background noise of used vinyl.

On my more quiet vinyl discs or CD's I often will up to Dolby C to gain the higher signal to noise ratio. The hiss it then below the noise floor of the very quiet high quality vinyl disc and a bit higher than the noise floor of cd's again then adding a slightly smoother and more depth perception to CD sound.

So one should not rule out the fidelity of a properly working and better quality cassette deck be it a top notch 2 header or more often than not quality 3 header.

Besides again it can be fun to make your own tapes and play with the tools of a cassette deck ultimately watching those meters dance as you listen to the music.
Les_creative_edge has put into words the fascinating phenomenon of enhanced enjoyment of analog tape recordings with their ever present but still unobtrusive background hiss.
This has long been noted by myself and another family member who feel many CD's can have a sterile or cold quality due to the background of total silence, unlike the real world in which we live and listen.
Thanks to Les_creative_edge for explaining why when tape recording he chooses either Dolby B or C noise reduction in order to better match the source material.