I used to put so much time into playlists and general organizing/finetuning back when I used iTunes. Since the streaming age I just have a huge list of favorites and play that on shuffle sometimes.
I have some special playlists. One has songs I like singing along to and one has a few womens power ballads by Whitney Houston, Mariah Carey and Celine Dion that I like to turn up on long car trips from time to time.
I also had the thought that I would like someone to curate playlists for me based on mood. I often listen to a song and think, damn I wish I had a playlist with songs like this. Then I create a playlist with one song in it, struggle with naming it, name it „Vibing“ or „Goose bumps“ or something stupid like that and then never touch it again.