Depends whether you look at things in terms of the thinking behind them or whether you just like the end result.
Myself, I'm fairly ignorant of art, so I go by the end result, and I'm partial to the odd bit of pop art & constructivism.
Some (most?) artists produce stuff that really does range from ace to gopping – take Hockney – a bigger splash is ace, but some of his other stuff is just bad drawings on the theme of being gay…
The other issue is that this stuff is pricey & sought after, so if you go to a public exhibition of a well known artist (particularly at a less well known/funded gallery), a lot of their better work is in private hands, which means that you'll perhaps get one of their better pictures surrounded by ten of their more poxy works.
What happens when someone becomes a famous artist is that the equivalent of what would be a writer's first drafts and jotted notes are suddenly seen as important, and become valuable. Some choose to destroy the stuff they're not happy with, some flog it regardless 😆