How do you select songs to add to your playlists?

[AdamDam]

Do you create your own playlists on Spotify?

If so, are there any criteria/rules that guide your decisions about what songs will go in your playlists? 

Here are some of my own criteria for adding songs to my Spotify playlists:

• I need to enjoy the song all the way through, as well as upon repeated listens, to add it to a playlist. This means that I often re-listen to a song that I’ve just discovered several times before making a decision about whether to add it to any playlists.
• The song must be representative of the playlist’s theme. My playlists nearly always have themes (usually genres of music) as indicated in their titles, and I try to make their song selections reflect their themes as best as I can.
• For most of my playlists (there are a few exceptions), I include at most 3 songs by any artist as a measure to keep the song selection relatively diverse, artist-wise—so if I already have 3 songs by an artist in a playlist, I typically won’t add another track of theirs unless I also remove one of their current ones.

I’m curious to hear about others’ criteria/rules for adding songs to playlists as well, so feel free to share!

Cheers!