How do you use Liked Songs?

I recently started using it to save all my favorite songs and ones I don’t want to forget, after having them dumped into a massive playlist.

However, I wonder how much this affects my taste profile. Having a lot of liked songs, even ones I haven’t listened to in a while.

I’m curious to know how you others use it and how/if you combine it with playlists. I want to think of it as just a library for all the songs I like, just not sorted. What about with downloading songs?