If something interests me I add it to the list. Not overly concerned with critical opinion if its negative.

Sometimes I will seek other things based on enjoying something. So an actor or director’s other works for example.

Talking to people and finding out what they enjoy and then evaluating whether or not it is interesting to you is a good way to isolate something. For example KPop Demon Hunters looked like slop to me (and I enjoy some Korean media), but someone at work started talking about it and that got me just interested enough to take a look into it and them watch and subsequently enjoy it.