so what's wrong with 5 and 6? If it can be articulated.
Well, stage 5 just seems like a glorified regression to stage 2 — although you now technically have a justification for your takes, it is an ex post facto one which makes it all but worthless, and slavishly applying that model to new things can easily result in outcomes that are actually worse than just going with your gut feel on a case-by-case basis. I completely fail to see why stage 6 is even relevant.
But the insight from #5 is true. There
is a difference between emotional reactions to something that are, e.g., likely to apply to other people who are similar to you, and ones that aren't, and something like this is probably correlated with feelings in stage 2. They track
something, you just have to understand what. It's a mistake by #3 and to throw them out.
Like, say you listen to one band and think they're simplistic and boring, and you listen to another band and think their music has lots going on but it doesn't speak to you. This is the kind of thing where #2 would say the first is bad and second "not for me". Calling the first bad is meaningless because bad is meaningless, but the difference does correspond to objective properties of the music, they're just hard to describe. The safest measurable thing is "probability that various other people would agree with me".